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• Why would you need a slash at the end of a URL?

  - by Daniel

  Is there a difference between these URLs in regards to having slashes at the end of the URL? https://drchrono.com/about_us https://drchrono.com/about_us/ Do web frameworks and web servers (e.g. Apache, Nginx, Django) handle these requests differently?

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• Communication between Activities: Intent or Service: what is faster?

  - by Sebi

  Is there a significant difference in time needed for sending data over a service or by using an intent? Are there general advices when to use service and when to use intents?

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• string or nsstring with string

  - by joels

  Lets assume myProp is @property (retain) NSString * myProp and synthesized for us.... self.myProp = @"some value";//string literal? self.myProp = [NSString stringWithString:@"some value"]; Is there a difference here? Is the first one a string literal that doesnt get autoreleased or is it just in memory for it's current scope and I dont have to worry about it?

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• C# Lambda expression syntax: are brackets necessary?

  - by DevNovice

  I'm new in C# and earlier I saw the lambda expression is like (params) => { expression;} but in LINQ, I saw examples like IEnumerable<string> customerFirstNames = customers.Select(cust => cust.FirstName); No brackets. Are they the same or is there any difference? Thanks a lot.

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• Why are Ruby projects so dominant at Github?

  - by timepilot

  Ruby is the most popular language at Github by far. Compare that with the questions at Stack Overflow or the TIOBE index. What is the reason for this difference in relative popularity in different places?

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• commands executing in piping in UNIX

  - by Happy Mittal

  when I write a command $ echo date then it prints "date" as it is i.e it doesn't run date program. But when I write $ echo date | wc then correct answer is produced as if date was run. How piping is making difference here ? Please explain.

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• Can I use an abstract class instead of a private __construct() when creating a singleton in PHP?

  - by Pheter

  When creating a Singleton in PHP, I ensure that it cannot be instantiated by doing the following: class Singleton { private function __construct() {} private function __clone() {} public static function getInstance() {} } However, I realised that defining a class as 'abstract' means that it cannot be instantiated. So is there anything wrong with doing the following instead: abstract class Singleton { public static function getInstance() {} } The second scenario allows me to write fewer lines of code which would be nice. (Not that it actually makes much of a difference.)

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• Dynamically resizing CFWINDOW to fit content

  - by Ryan French

  Hi all, Am currently working on a site that uses a lot of cfwindow objects and I was wondering if anyone knows of a way to dynamically resize the window so that all the content fits in without the need for scroll bars. I have tried using the overflow=visible configuration but it doesnt seem to make a difference. Thanks in advance for any advice.

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• MailMessage Question/Confusion

  - by j-t-s

  Using this: MailMessage mm = new MailMessage(); What is the difference between: mm.Sender = sender; and mm.From = from; ? Thank you

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• Monitor vs Watch on SourceForge Tracker

  - by Vulcan Eager

  What exactly is the difference Watching and Monitoring a project on the SourceForge Tracker UI? PS: The tool tips are really helpful. Hold your mouse over the "Monitor" button and it says "Monitor this project"... hold it over "Watch" and it says nothing. That's really awesome coming from SF.

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• Comment Starting with /*!

  - by Phonethics

  My editor (geany) changes the comment colour when the comments starts with /*! Whats the difference between /* ... */ and /*! ... */

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• Better to use an OR or an AND when checking for NULLs in C if statements?

  - by Crazy Chenz

  Came across a line in OpenSSL that made me do a double take... if (!*pos) return NULL; if (!*pos || ((*pos)->flags == FLAGS)) return blah; Is there a (performance/security/concurrecy) difference in doing that instead of: if (!*pos) return NULL; if (*pos && ((*pos)->flags == FLAGS)) return blah; Thanks, Chenz

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• Buisness Rule and Process Management?

  - by elgcom

  After some searching in google and wikipedia, I still can not get a clear image about the "difference" between BRMS (Business Rule Management System) and BPM (Business process management)/workflow system. can those two concepts do the same thing from each other? (theoretically) A "rule" can be modeled as a "process" as well. isn't it?

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• Differences in the different ways to make concurrent programs

  - by dotnetdev

  Hi, What is the difference between: Starting a new thread Using TPL Using BackgroundWorker All of these create concurrency but what are the low-level differences between these? Do all 3 make threads anyway? Thanks

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• differences between socket and port in database context

  - by Yang

  hi guys, when i am using 'localhost' as the host for mysql database, sequel pro alert me that i will be using socket, if i am using '127.0.0.1', i am actually using the ip address and port 3306 to locate the server. is there any difference?

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• Which DateTime module is best for manipulating an XML date and time

  - by justintime

  I am trying to parse a date from a GPX (XML track format) that looks like 2009-08-02T12:11:06Z My initial approach was to use DateTime::Format::RFC3339 But DateTime:Format::XSD seems to do a similar job. Is there a difference between the applicability of these modules.

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• Example of xargs' -x option in action

  - by Ole Tange

  GNU xargs has option '-x'. The man page says: -x Exit if the size (see the -s option) is exceeded. But xargs seems to not care if -x is set or not. I have been unable to make an example in which the -x has any effect at all. Please provide two examples in which the only difference is an added -x and that produce different output.

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• List comprehension, map, and numpy.vectorize performance

  - by mcstrother

  I have a function foo(i) that takes an integer and takes a significant amount of time to execute. Will there be a significant performance difference between any of the following ways of initializing a: a = [foo(i) for i in xrange(100)] a = map(foo, range(100)) vfoo = numpy.vectorize(foo) a = vfoo(range(100)) (I don't care whether the output is a list or a numpy array.) Is there a better way?

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• Python `if x is not None` or `if not x is None`?

  - by orokusaki

  I've always thought of the if not x is None version to be more clear, but Google's style guide implies (based on this excerpt) that they use if x is not None. Is there any minor performance difference (I'm assuming not), and is there any case where one really doesn't fit (making the other a clear winner for my convention)?* *I'm referring to any singleton, rather than just None. ...to compare singletons like None. Use is or is not.

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• Shallow copy versus Deep Copy of user defined types.

  - by Codenotguru

  what is the difference between a shallow copy and deep copy with respect to user defined types and why do we need to perform a deep copy during copy construction for user defined types??

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• SQL CE, SQLite. What are the differences between them?

  - by acidzombie24

  What is the difference between SQL CE and SQLite? In what situation would i choose one over the other?

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• Emacs bulk indent for Python

  - by Vernon

  Working with Python in Emacs if I want to add a try/catch to a block of code, I often find that I am having to indent the whole block, line by line. In Emacs, how do you indent the whole block at once. I am not an experienced Emacs user, but just find it is the best tool for working through ssh. I am using Emacs on the command line(Ubuntu), not as a gui, if that makes any difference.

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• #pragma once Versus #if !defined MYHEADER_INCLUDED_

  - by bdhar

  What is/are the differences (in performance/usability/functionality) in using #pragma once and #if !defined MYHEADER_INCLUDED_ constructs? Or what is the difference between the two?

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• (Why) does Tomcat/Java perform better on Linux than on Windows?

  - by ripper234

  I just read this (one) study in which Tomcat under Linux outperformed Windows. From your experience, is this generally true? Any deep reason that could explain the performance difference?

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• Excel Merge() vs MergeCells

  - by sleepp

  Hi, I'm using VSTO, C#, and Excel but VBA probably applies here as well. What's the difference between calling the Merge(missing) method on a range and setting the MergeCells property to true? Does Merge() fail more often? Thanks!

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