For loops in Matlab
- by seidel
I run through a for loop, each time extracting certain elements of an array, say element1, element2, etc. How do I then pool all of the elements I've extracted together so that I have a list of them?
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converting timestamp to nanoseconds
- by kuki
I have a certain value of date and time say 28-3-2012(date) - 10:36:45(time) . I wish to convert this whole timestamp to nanoseconds with the precision of nanoseconds. As in the user would input the time and date as shown but internally i have to be accurate upto nanoseconds and convert the whole thing to nanoseconds to form a unique key assigned to a specific object created at that particular time. Could some one please help me with the same..Read the article
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Rails routing question: how to pass a hash property to a generated resource?
- by SergioB
say I have this on my routes.rb: resources :accounts which gives me, among other things: new_account GET /account/new I need to generate this (for example) "/account/new#test" How do you pass the "#test" to new_account_path() ?Read the article
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How should I grab pairs from an array in python?
- by tomaski
Say I have an array that looks like this: ['item1', 'item2', 'item3', 'item4', 'item5', 'item6', 'item7', 'item8', 'item9', 'item10'] Using Python, how would I grab pairs from it, where each item is included in a pair with both the item before and after it? ['item1', 'item2'] ['item2', 'item3'] ['item3', 'item4'] ['item4', 'item5'] ['item5', 'item6'] ['item6', 'item7'] ['item7', 'item8'] ['item8', 'item9'] ['item9', 'item10'] Seems like something i could hack together, but I'm wondering if someone has an elegant solution they've used before?Read the article
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Values of Integers and Calculations
- by inferno2991
Say you have a variable n1 which will be the value of three digits entered how can i then without knowing what exactly will be input split n1 into 3 seperate integers to do futher calculations with?Read the article
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How to save massive numbers in php...
- by James Rattray
I want Pi to like 100,000,000 decimals/digits... And variables (well for me) say they have a limit of 67,000,000 bytes... Is there any way around this? can you save the first 10,000 characters/digits into one? can you save it into an array 10,000 in each? Is there a way? If so how? Thanks alot...Read the article
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PHP - regular expression to remove beginning and end chars from a string?
- by John
Let's say I have a string like so: $file = 'widget-widget-newsletter.php'; I want to use preg_replace() to remove the prefix widget- and to remove the suffix .php . Is it possible to use one regular expression to achieve all this? The resulting string should be widget-newsletter.Read the article
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How to pass a variable to a IN clause?
- by Thanu
Lets say I have a SP that has a SELECT statements as follows, SELECT product_id, product_price FROM product WHERE product_type IN ('AA','BB','CC'); But data goes to that IN clause must be through a single variable that contains the string of values. Something link below SELECT product_id, product_price FROM product WHERE product_type IN (input_variables); But its not working that way. Any idea how to do this?Read the article
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How to do a non-waiting write on a named pipe (c#) ?
- by Jelly Amma
Hello, I'm using .net 3.5 named pipes and my server side is : serverPipeStream = new NamedPipeServerStream("myPipe", PipeDirection.InOut, 1, PipeTransmissionMode.Byte, PipeOptions.Asynchronous); When I write some data with, say, BinaryWriter, the write() call itself doesn't return until the client side has called a read() on its NamedPipeClientStream. How can I make my write() to the named pipe non-blocking ? Thanks in advance for any help.Read the article
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How is the result of openssl_sign() encoded?
- by Bozho
The docs about openssl_sign() say that the signature is returned in the passed string argument. My question is - how is it encoded? Base64, Hex-string, anything else? I don't have php installed and I have to use this PHP code I was given simply in order to verify whether my Java implementation is correct, so don't ask me "have you tried it" ;)Read the article
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Starting other Applications with Java
- by moppel
Is it possible to start other application that are installed on the system with my java app and pass a file as a parameter to them? I have a client which receives videos from a server and I want my client program to start, lets say the VLC player with the file that I received. How do I manage to do that?Read the article
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tracking visitors after they have left my site
- by skub
Just wondering if it is possible to track what the user does on other sites. Say for example a user comes to my site and I track his actions with a cookie. Now is there any way that I can track this user's activities after they have left my site?Read the article
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add 2 chars without using strncopy ?
- by every_answer_gets_a_point
how would i manually add two chars without using the strncopy function? can i just say char1 + char2? or would i have to write a for loop to get individual elements and add them like this: addchar[0] = char1[0]; addchar[1] = char1[1]; etc etc addchar[n] = char2[0]; addchar[n+1] = char2[1]; etc etcRead the article
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What's the recommended way of create Android libraries for use in apps?
- by mabutt
I have an app, say MyApp Free. I want to create MyApp Pro which I can charge for that has some additional functionality. The obvious way is to have a library that contains almost all my app code, then two Android app projects for the Free and Pro versions which reference that library. Suggestions?Read the article
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How to map a long integer number to a N-dimensional vector of smaller integers (and fast inverse)?
- by psihodelia
Given a N-dimensional vector of small integers is there any simple way to map it with one-to-one correspondence to a large integer number? Say, we have N=3 vector space. Can we represent a vector X=[(int32)x1,(int32)x2,(int32)x3] using an integer (int48)y? The obvious answer is "Yes, we can". But the question is: "What is the fastest way to do this and its inverse operation?"Read the article
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Restrict type of method parameter with two or more class names?
- by Kirzilla
Hello, We can restrict type of method parameters; for example, we should say that function parameter should be an instance of object described in class with name "Some Class". function some_function(Some_Class $object) { } Is there any php native posibilities to restrict method parameter with two or more classes? For examle, "Some Class" or "Some Class2" or "Some Class3". Or maybe there is any way to restrict method parameter with classes which implements interface with name "Some_Interface"? Thank you.Read the article
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How to use __LINE__ in a string
- by John
Just using it as a method parameter is fine but what about an easy way to use it in strings? For instance say I have this: 11 void myTest() 12 { 13 if(!testCondition) 14 logError("testcondition failed"); 15 } And I want the output to be: "myTest line 14: testcondition failed" How can I write logError? Does it have to be some monstrosity of a macro?Read the article
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Is The Transaction Log Truncated When Doing a Backup In Full Recovery Mode?
- by byte_slave
Is the database transaction log automatically truncated after we create a backup and the DB is in full recovery mode? Or do we need to make 2 different backups, let's say 1 in full recovery mode and a different one for the log file.Read the article
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Explain this PHP shorthand
- by editor
I feed like a goof but I don't entirely understand what's happening in this code: $var .= ($one || $two) ? function_one( $one, $another) : function_two( $two, $another); Does that say if $one or $two then $var is equal to fuction_one(), else function_two()? What's the purpose of using this syntax -- speed?Read the article
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safely reading directory contents
- by Jack
Is it safe to read directory entries via readdir() or scandir() while files are being created/deleted in this directory? Should I prefer one over the other? When I say "safe" I mean entries returned by these functions are valid and can be operated without crushing the program. Thanks.Read the article
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MySQLi - Should every statement be prepared?
- by Kerry
I know its supposed to improve performance and clean strings, but lets say there are no variables? Might just be a SELECT COUNT( `column` ) AS count FROM `table` Should that be prepared? Is there any case that a SELECT statement should not be prepared?Read the article
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image slideshow with effect
- by MB
hi, how can i made some nice slideshow for the index.html page, with lets say 5 images and a some effect when images are changing?Read the article
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Data structure in C# (3.0) that represents a CUBE
- by Thinking
Can you please give me some idea about how to design a data structure in C# (3.0) which will give a representation of 3D data structure. I mean to say something similar to cube. Like stock data to be viewed based on time , location . Kindly give a simple working example or even a link will do. It's urgent. Any example will be appreciated. Thanks in advanceRead the article
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is it possible to get the class of the interface <Set>
- by user1164885
Am having some arguments say (String a, Treeset b, Set c) and i try to get the class by arguments[i].getClass(); of the above arguments.. is it possible to get the class of the interface . ex., Class[] argumentTypes = new Class [arguments.length]; for (int i = 0 ; i < arguments.length ; i++) { argumentTypes[i] = arguments[i].getClass(); }Read the article
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if i entered numbers with comas, how could i get the number only?
- by WM
for example.... 26, 15, 37 how could i get the numbers from a Scanner , ( lets say for instance i want to add or subtract,,,?)Read the article
