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  • Is MySecureShell a good way to manage SFTP user with chroot on a Centos Server?

    - by benjisail
    Hi, I need to setup my Centos 5.4 server for SFTP with chrooted access only (or equivalent). The regular solution using RSSH find here : http://www.cyberciti.biz/tips/howto-linux-unix-rssh-chroot-jail-setup.html seems over-killing to me if we want to manage multiple users... I found the project MySecureShell which seems a lot simpler to install and to maintain. Is it a good solution? Is there something better? Thanks!!

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  • Will these optimizations to my Ruby implementation of diff improve performance in a Rails app?

    - by grg-n-sox
    <tl;dr> In source version control diff patch generation, would it be worth it to use the optimizations listed at the very bottom of this writing (see <optimizations>) in my Ruby implementation of diff for making diff patches? </tl;dr> <introduction> I am programming something I have never done before and there might already be tools out there to do the exact thing I am programming but at this point I am having too much fun to care so I am still going to do it from scratch, even if there is a tool for this. So anyways, I am working on a Ruby on Rails app and need a certain feature. Basically I want each entry in a table of mine, let's say for example a table of video games, to have a stored chunk of text that represents a review or something of the sort for that table entry. However, I want this text to be both editable by any registered user and also keep track of different submissions in a version control system. The simplest solution I could think of is just implement a solution that keeps track of the text body and the diff patch history of different versions of the text body as objects in Ruby and then serialize it, preferably in human readable form (so I'll most likely use YAML for this) for editing if needed due to corruption by a software bug or a mistake is made by an admin doing some version editing. So at first I just tried to dive in head first into this feature to find that the problem of generating a diff patch is more difficult that I thought to do efficiently. So I did some research and came across some ideas. Some I have implemented already and some I have not. However, it all pretty much revolves around the longest common subsequence problem, as you would already know if you have already done anything with diff or diff-like features, and optimization the function that solves it. Currently I have it so it truncates the compared versions of the text body from the beginning and end until non-matching lines are found. Then it solves the problem using a comparison matrix, but instead of incrementing the value stored in a cell when it finds a matching line like in most longest common subsequence algorithms I have seen examples of, I increment when I have a non-matching line so as to calculate edit distance instead of longest common subsequence. Although as far as I can tell between the two approaches, they are essentially two sides of the same coin so either could be used to derive an answer. It then back-traces through the comparison matrix and notes when there was an incrementation and in which adjacent cell (West, Northwest, or North) to determine that line's diff entry and assumes all other lines to be unchanged. Normally I would leave it at that, but since this is going into a Rails environment and not just some stand-alone Ruby script, I started getting worried about needing to optimize at least enough so if a spammer that somehow knew how I implemented the version control system and knew my worst case scenario entry still wouldn't be able to hit the server that bad. After some searching and reading of research papers and articles through the internet, I've come across several that seem decent but all seem to have pros and cons and I am having a hard time deciding how well in this situation that the pros and cons balance out. So are the ones listed here worth it? I have listed them with known pros and cons. </introduction> <optimizations> Chop the compared sequences into multiple chucks of subsequences by splitting where lines are unchanged, and then truncating each section of unchanged lines at the beginning and end of each section. Then solve the edit distance of each subsequence. Pro: Changes the time increase as the changed area gets bigger from a quadratic increase to something more similar to a linear increase. Con: Figuring out where to split already seems like you have to solve edit distance except now you don't care how it is changed. Would be fine if this was solvable by a process closer to solving hamming distance but a single insertion would throw this off. Use a cryptographic hash function to both convert all sequence elements into integers and ensure uniqueness. Then solve the edit distance comparing the hash integers instead of the sequence elements themselves. Pro: The operation of comparing two integers is faster than the operation of comparing two strings, so a slight performance gain is received after every comparison, which can be a lot overall. Con: Using a cryptographic hash function takes time to convert all the sequence elements and may end up costing more time to do the conversion that you gain back from the integer comparisons. You could use the built in hash function for a string but that will not guarantee uniqueness. Use lazy evaluation to only calculate the three center-most diagonals of the comparison matrix and then only calculate additional diagonals as needed. And then also use this approach to possibly remove the need on some comparisons to compare all three adjacent cells as desribed here. Pro: Can turn an algorithm that always takes O(n * m) time and make it so only worst case scenario is that time, best case becomes practically linear, and average case is somewhere between the two. Con: It is an algorithm I've only seen implemented in functional programming languages and I am having a difficult time comprehending how to convert this into Ruby based on how it is described at the site linked to above. Make a C module and do the hard work at the native level in C and just make a Ruby wrapper for it so Ruby can make all the calls to it that it needs. Pro: I have to imagine that evaluating something like this in could be a LOT faster. Con: I have no idea how Rails handles apps with ruby code that has C extensions and it hurts the portability of the app. This is an optimization for after the solving of edit distance, but idea is to store additional combined diffs with the ones produced by each version to make a delta-tree data structure with the most recently made diff as the root node of the tree so getting to any version takes worst case time of O(log n) instead of O(n). Pro: Would make going back to an old version a lot faster. Con: It would mean every new commit, the delta-tree would get a new root node that will cost time to reorganize the delta-tree for an operation that will be carried out a lot more often than going back a version, not to mention the unlikelihood it will be an old version. </optimizations> So are these things worth the effort?

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  • An affordable way to use multiple Delayed::Job queues

    - by NudeCanalTroll
    I have a Ruby on Rails app that needs process many background jobs simultaneously: anywhere from 5-6 at a time to up to 50-60 at a time depending on the time of day. Right now my app is running on Heroku, which charges $.05/hour per worker, regardless of how much CPU or memory the worker is using. This is costing me a boatload each month... up to $1200/mo. Are there any hosts that will allow me to do what I'm doing for significantly cheaper?

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  • HTTP Content-type header for cached files

    - by Brian
    Hello, Using Apache with mod_rewrite, when I load a .css or .js file and view the HTTP headers, the Content-type is only set correctly the first time I load it - subsequent refreshes are missing Content-type altogether and it's creating some problems for me. Specifically, gzip is not compressing these files. I can get around this by appending a random query string value to the end of each filename, eg. http://www.site.com/script.js?12345 However, I don't want to have to do that, since caching is good and all I want is for the Content-type to be present. I've tried using a RewriteRule to force the type but still didn't solve the problem. Any ideas? Thanks, Brian More Details: HTTP headers WITHOUT random query string value: http://localhost/script.js GET /script.js HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept: */* Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Connection: keep-alive Referer: http://localhost/ Cookie: PHPSESSID=ke3p35v5qbus24che765p9jni5; If-Modified-Since: Thu, 29 Apr 2010 15:49:56 GMT If-None-Match: "3440e9-119ed-485621404f100" Cache-Control: max-age=0 HTTP/1.1 304 Not Modified Date: Thu, 29 Apr 2010 20:19:44 GMT Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 PHP/5.3.1 Connection: Keep-Alive Keep-Alive: timeout=5, max=100 Etag: "3440e9-119ed-485621404f100" Vary: Accept-Encoding X-Pad: avoid browser bug HTTP headers WITH random query string value: http://localhost/script.js?c947344de8278053f6edbb4365550b25 GET /script.js?c947344de8278053f6edbb4365550b25 HTTP/1.1 Host: localhost User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.3) Gecko/20100401 Firefox/3.6.3 Accept: */* Accept-Language: en-us,en;q=0.5 Accept-Encoding: gzip,deflate Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive: 115 Connection: keep-alive Referer: http://localhost/ Cookie: PHPSESSID=ke3p35v5qbus24che765p9jni5; HTTP/1.1 200 OK Date: Thu, 29 Apr 2010 20:14:40 GMT Server: Apache/2.2.14 (Unix) mod_ssl/2.2.14 OpenSSL/0.9.8l DAV/2 PHP/5.3.1 Last-Modified: Thu, 29 Apr 2010 15:49:56 GMT Etag: "3440e9-119ed-485621404f100" Accept-Ranges: bytes Vary: Accept-Encoding Content-Encoding: gzip Content-Length: 24605 Keep-Alive: timeout=5, max=100 Connection: Keep-Alive Content-Type: application/javascript

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  • ArrayList in Java, adding code to methods

    - by yaz
    Why am I getting a compile time error for the two method headers at the end of my code in my class ArrayListTest? ArrayListTest: http://pastebin.com/dUHn9vPr Student: http://pastebin.com/3Vz1Aytr I have a compiler error at the two lines: delete(CS242, s3) replace(CS242, s, s4); When I try to run the code it states: Exception in thread "main" java.lang.Error: Unresolved compilation problems: The method replace(ArrayList<Student>, Student, Student)in the type ArrayListTest is not applicable for the arguments (List<Student>, Student, Student) The method delete(ArrayList<Student>, Student) in the type ArrayListTest is not applicable for the arguments (List<Student>, Student) at ArrayListTest.main(ArrayListTest.java:54) I fixed the compile time errors since I use Eclipse and Eclipse gives options of code you can use to fix the compile time error. I chose to "Change method to 'replace(ArrayList, Student, Student)' to 'replace(List, Student, Student)' Although it fixed that compile time error, I don't understand why I was getting a compile time error to begin with and why that effectively fixed the error I don't really know what missing code I need to write to correct these two methods below: public static void replace(List<Student> cS242, Student oldItem, Student newItem) { public static void delete(List<Student> cS242, Student target){

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  • How to Compare Dates in php?

    - by Ramakrishnan
    i need code to compare date in php Input date should be a valid date input date should not be less than the current date. i need to give time zones EST,PST,etc.. We need to make the time to GMT and compare with Current Time. can anyone help on this. Thanks Ramakrishnan.p

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  • MySQL column not found

    - by vian
    The SQL query without where statement runs great and outputs good results, but when I include WHERE condition it shows Unknown column 'date1' in 'where clause'. What's the problem? SELECT IF(e.weekly, DATE_ADD(DATE(e.time), INTERVAL CEIL(DATEDIFF('2010-04-08', e.time)/7) WEEK), DATE(e.time)) AS `e.date1`, `v`.`lat`, `v`.`lng` FROM `events` AS `e` INNER JOIN `venues` AS `v` ON e.venue_id = v.id WHERE e.date1 > '2010-09-01'

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  • performance of large number calculations in python (python 2.7.3 and .net 4.0)

    - by g36
    There is a lot of general questions about python performance in comparison to other languages. I've got more specific example: There are two simple functions wrote in python an c#, both checking if int number is prime. python: import time def is_prime(n): num =n/2 while num >1: if n % num ==0: return 0 num-=1 return 1 start = time.clock() probably_prime = is_prime(2147483629) elapsed = (time.clock() - start) print 'time : '+str(elapsed) and C#: using System.Diagnostics; public static bool IsPrime(int n) { int num = n/2; while(num >1) { if(n%num ==0) { return false; } num-=1; } return true; } Stopwatch sw = new Stopwatch(); sw.Start(); bool result = Functions.IsPrime(2147483629); sw.Stop(); Console.WriteLine("time: {0}", sw.Elapsed); And times ( which are surprise for me as a begginer in python:)): Python: 121s; c#: 6s Could You explain where does this big diffrence come from ?

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  • setting apache environment variable

    - by Kiran
    My hosting environment using Server version: Apache/2.2.14 (Unix) and I am modifying ./usr/local/apache/conf/httpd.conf to set environment variable and restarting the server . SetEnv XML-RPC-IPs 193.45.32.21 I did set it as a first entry in the file and restarted the server . But even restarting if I try to print it is still getting me black , Am I missing any thing ? echo "My IP address ".$_SERVER['XML-RPC-IPs']; Thanks for your help Regards Kiran

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  • How to stop a process in Terminal [closed]

    - by AngryHacker
    Possible Duplicate: Ending a process in unix instead of interrupting it When I task in Terminal, such as ping blah.com, how do I then stop this task (other than closing the Terminal window. In Windows, you can Ctrl+Break pretty much any terminal based process, but I can't figure out the way to do it on the Mac.

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  • Android AlertDialog with dynamically changing text on every request

    - by Ulrich Scheller
    I want to show an AlertDialog with one option that might change on every request. So for example at one time I want to show the option "add to contacts" while another time it should be "remove from contacts". My code does work on the first time, however Android seems to cache the AlertDialog so that onCreateDialog is not executed next time. Therefore the option doesnt change anymore. Can I prevent this caching, or is there just another way of changing the option? I am working with SDK 1.5 but using 1.1. @Override protected Dialog onCreateDialog(final int id) { ... String add_remove_contact = res.getString(R.string.profile_add_to_contacts); if (user.getContacts().contains(profileID)) { add_remove_contact = res.getString(R.string.profile_remove_from_contacts); // TODO: this string is not changed when contact status changes } final CharSequence[] items = {res.getString(R.string.view_profile), res.getString(R.string.profile_send_message), add_remove_contact}; AlertDialog.Builder builder = new AlertDialog.Builder(this); ... return builder.create(); }

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  • Bring object to the front, in Flash AS3

    - by jimbo
    Hi All, i have the below code, which is basically animating object across the screen, when roll-over happens it pauses the anim, and displays some information. Everything works fine, but when its paused, i wold like that current object to be 'on top' so other items run behind. I have looked at setChildIndex, but didn't have much luck. package { import flash.display.MovieClip; import flash.display.Sprite; import flash.events.MouseEvent; import flash.geom.Point; import flash.events.KeyboardEvent; import flash.events.*; import caurina.transitions.Tweener; import fl.motion.Color; public class carpurchase extends Sprite { public function carpurchase() { var carX = 570; //Set cars var car1:fullCar = new fullCar(); car1.info.alpha = 0; //var c:Color = new Color(); //c.setTint(0xff0000, 0.8); //car2.car.transform.colorTransform=c; car1.x = carX; car1.y = 280; car1.info.title.text = "test"; car1.info.desc.text = "test"; addChild(car1); car1.addEventListener(MouseEvent.ROLL_OVER, carPause); car1.addEventListener(MouseEvent.ROLL_OUT, carContinue); function car1Reset():void { Tweener.addTween(car1, {x:carX, time:0, onComplete:car1Tween}); } function car1Tween():void { Tweener.addTween(car1, {x:-120, time:2, delay:3, transition:"linear", onComplete:car1Reset}); } car1Tween(); var car2:fullCar = new fullCar(); car2.info.alpha = 0; var c:Color = new Color(); c.setTint(0xff0000, 0.8); car2.car.transform.colorTransform=c; car1.x = carX; car2.y = 175; car2.info.title.text = "test"; car2.info.desc.text = "test"; addChild(car2); car2.addEventListener(MouseEvent.ROLL_OVER, carPause); car2.addEventListener(MouseEvent.ROLL_OUT, carContinue); function car2Reset():void { Tweener.addTween(car2, {x:carX, time:0, onComplete:car2Tween}); } function car2Tween():void { Tweener.addTween(car2, {x:-120, time:3, delay:0, transition:"linear", onComplete:car2Reset}); } car2Tween(); function carPause(e:MouseEvent):void { Tweener.pauseTweens(e.target); Tweener.addTween(e.target.info, {y:-150, alpha:1, time:.5, transition:"easeout"}); } function carContinue(e:MouseEvent):void { Tweener.addTween(e.target.info, {y:10, alpha:0, time:.5, transition:"easeout"}); Tweener.resumeTweens(e.target); } } } Any help welcome

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  • ActiveRecord model with datetime stamp with timezone support attribute.

    - by jtarchie
    Rails is great that it will support timezone overall in the application with Time.zone. I need to be able to support the timezone a user selects for a record. The user will be able to select date, time, and timezone for the record and I would like all calculations to be done with respect to the user selected timezone. My question is what is the best practice to handle user selected timezones. The model is using a time_zone_select and datetime_select for two different attributes timezone and scheduled_at. When the model saves, the scheduled_at attribute gets converted to the locally defined Time.zone. When a user goes back to edit the scheduled_at attribute with the datetime_select the datetime is set to the converted Time.zone timezone and not the timezone attribute. Is there a nice way to handle to the conversion to the user selected timezone?

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  • setting apache environment variable

    - by Kiran
    Hi , My hosting environment using Server version: Apache/2.2.14 (Unix) and I am modifying ./usr/local/apache/conf/httpd.conf to set environment variable and restarting the server . SetEnv XML-RPC-IPs 193.45.32.21 I did set it as a first entry in the file and restarted the server . But even restarting if I try to print it is still getting me black , Am I missing any thing ? echo "My IP address ".$_SERVER['XML-RPC-IPs']; Thanks for your help Regards Kiran

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  • How to fill byte array with junk?

    - by flyout
    I am using this: byte[] buffer = new byte[10240]; As I understand this initialize the buffer array of 10kb filled with 0s. Whats the fastest way to fill this array (or initialize it) with junk data every time? I need to use that array like 5000 times and fill it every time with different junk data, that's why I am looking for a fast method to do it. The array size will also have to change every time.

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  • Can I mount a volume at /Users on OS X?

    - by bshacklett
    I'm considering purchasing a SSD for my Macbook Pro. Unfortunately, I can't afford a large one, so I'm thinking of moving the current hard drive to the optical bay. On a Linux system, I would mount the second drive at /home. Given that OS X is Unix, I'm thinking it should be possible to do the same thing. Has anyone done this before? Edit: I should mention I'm running Snow Leopard.

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  • here is my code in Jquery and Asp.net Unable to get a correct ANS as I am getting from jquery?

    - by ricky roy
    unable to get the correct Ans as i am getting from the Jquery I am using jquery.countdown.js here is my code [WebMethod] public static String GetTime() { DateTime dt = new DateTime(); dt = Convert.ToDateTime("April 9, 2010 22:38:10"); return dt.ToString("dddd, dd MMMM yyyy HH:mm:ss"); } html file <script type="text/javascript" src="Scripts/jquery-1.3.2.js"></script> <script type="text/javascript" src="Scripts/jquery.countdown.js"></script> <script type="text/javascript"> $(function() { var shortly = new Date('April 9, 2010 22:38:10'); var newTime = new Date('April 9, 2010 22:38:10'); //for loop divid /// $('#defaultCountdown').countdown({ until: shortly, onExpiry: liftOff, onTick: watchCountdown, serverSync: serverTime }); $('#div1').countdown({ until: newTime }); }); function serverTime() { var time = null; $.ajax({ type: "POST", //Page Name (in which the method should be called) and method name url: "Default.aspx/GetTime", // If you want to pass parameter or data to server side function you can try line contentType: "application/json; charset=utf-8", dataType: "json", data: "{}", async: false, //else If you don't want to pass any value to server side function leave the data to blank line below //data: "{}", success: function(msg) { //Got the response from server and render to the client time = new Date(msg.d); alert(time); }, error: function(msg) { time = new Date(); alert('1'); } }); return time; } function watchCountdown() { } function liftOff() { } </script>

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  • Rsync: remote source and destination

    - by goncalopp
    If both source and destination are remote, rsync complains: The source and destination cannot both be remote. rsync error: syntax or usage error (code 1) at main.c(1156) [Receiver=3.0.7] Is there a insurmountable technical obstacle to making rsync do this? Or it's simply a case of it's-not-yet-implemented? It seems relatively easy to create a local buffer in memory that mediates the transfer between two remotes, holding both hashes and data. Conversely, is there other (unix) software that implements this functionality?

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  • learn ubuntu book

    - by doug
    Hi there I'm cs student and we did some unix programming at school, but most of use are using windows os. I have decided to go on ubuntu. Besides installing ubuntu and using it, what book will teach me the "must" things to know about *nix OS?

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  • FTP not listing files behind firewall (setsockopt (ignored): Permission denied)

    - by KennyDs
    We are developing a Magento application that has a module that works with FTP. Today we deployed this on the testing environment which is setup in the following way: Gateway server which has the following iptables rules: # iptables -L -n -v Chain INPUT (policy ACCEPT 2 packets, 130 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- lo * 0.0.0.0/0 0.0.0.0/0 165 13720 ACCEPT all -- * * 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED Chain FORWARD (policy ACCEPT 7 packets, 606 bytes) pkts bytes target prot opt in out source destination 0 0 ACCEPT all -- eth1 eth0 0.0.0.0/0 0.0.0.0/0 state RELATED,ESTABLISHED 15 965 ACCEPT all -- eth0 eth1 0.0.0.0/0 0.0.0.0/0 0 0 REJECT all -- eth1 eth1 0.0.0.0/0 0.0.0.0/0 reject-with icmp-port-unreachable Chain OUTPUT (policy ACCEPT 126 packets, 31690 bytes) pkts bytes target prot opt in out source destination These are set at runtime via the following bash script: #!/bin/sh PATH=/usr/sbin:/sbin:/bin:/usr/bin # # delete all existing rules. # iptables -F iptables -t nat -F iptables -t mangle -F iptables -X # Always accept loopback traffic iptables -A INPUT -i lo -j ACCEPT # Allow established connections, and those not coming from the outside iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A FORWARD -i eth1 -o eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT # Allow outgoing connections from the LAN side. iptables -A FORWARD -i eth0 -o eth1 -j ACCEPT # Masquerade. iptables -t nat -A POSTROUTING -o eth1 -j MASQUERADE # Don't forward from the outside to the inside. iptables -A FORWARD -i eth1 -o eth1 -j REJECT # Enable routing. echo 1 > /proc/sys/net/ipv4/ip_forward The gateway server is connected to the WAN via eth1 and is connected to the internal network via eth0. One of the servers from eth1 has the following problem when trying to list files over ftp: $ ftp -vd myftpserver.com Connected to myftpserver.com 220 Welcome to MY FTP Server ftp: setsockopt: Bad file descriptor Name (myftpserver.com:magento): XXXXXXXX ---> USER XXXXXXXX 331 User XXXXXXXX, password please Password: ---> PASS XXXX 230 Password Ok, User logged in ---> SYST 215 UNIX Type: L8 Remote system type is UNIX. Using binary mode to transfer files. ftp> ls ftp: setsockopt (ignored): Permission denied ---> PORT 192,168,19,15,135,75 421 Service not available, remote server has closed connection When I try listing the files in passive mode, same result. When I run the same command on the gateway server, everything works fine so I believe that the issue is happening because of the iptables rules not forwarding properly. Does anyone have an idea which rule I need to add to make this work?

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  • postfix rate limiting

    - by Tourneur Henry-Nicolas
    Hi there, I did add a new slow transport to my Postfix configuration but this doesn't looks to work Messages passes correctly in the slow transport but they aren't rate limited. Currently, I'v been setting this up in my master.cf: slow unix - - n - 1 smtp -o default_destination_concurrency_limit=1 -o initial_destination_concurrency=1 -o smtp_destination_concurrency_limit=1 -o in_flow_delay=2s -o syslog_name=slow Any idea why my messages aren't rate limited? Regards,

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  • Understanding F# Asynchronous Programming

    - by Yin Zhu
    I kind of know the syntax of asynchronous programming in F#. E.g. let downloadUrl(url:string) = async { let req = HttpWebRequest.Create(url) // Run operation asynchronously let! resp = req.AsyncGetResponse() let stream = resp.GetResponseStream() // Dispose 'StreamReader' when completed use reader = new StreamReader(stream) // Run asynchronously and then return the result return! reader.AsyncReadToEnd() } In F# expert book (and many other sources), they say like let! var = expr simply means "perform the asynchronous operation expr and bind the result to var when the operation completes. Then continue by executing the rest of the computation body" I also know that a new thread is created when performing async operation. My original understanding was that there are two parallel threads after the async operation, one doing I/O and one continuing to execute the async body at the same time. But in this example, I am confused at let! resp = req.AsyncGetResponse() let stream = resp.GetResponseStream() What happens if resp has not started yet and the thread in the async body wants to GetResponseStream? Is this a possible error? So maybe my original understanding was wrong. The quoted sentences in the F# expert book actually means that "creating a new thread, hang the current thread up, when the new thread finishes, wake up the body thread and continue", but in this case I don't see we could save any time. In the original understanding, the time is saved when there are several independent IO operations in one async block so that they could be done at the same time without intervention with each other. But here, if I don't get the response, I cannot create the stream; only I have stream, I can start reading the stream. Where's the time gained?

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  • Overview of PHP shorthand

    - by James Simpson
    I've been programming in PHP for years now, but I've never learned how to use any shorthand. I come across it from time to time in code and have a hard time reading it, so I'd like to learn the different shorthand that exists for the language sot hat I can read it and start saving time/lines by using it, but I can't seem to find a comprehensive overview of all of the shorthand. A Google search pretty much exclusively shows the shorthand for if/else statements, but I know there must be more than just that. By shorthand, I am talking about stuff like: ($var) ? true : false;

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