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Null vs. False vs. 0 in PHP
...mpatibility). Despite the design wishing some consistency (outlined in the selected answer here), it all get confusing when you consider method returns that use false/null in not-so-easy to reason ways.
You will often see null being used when they are already using false for something. e.g. filter_i...
Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
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PostgreSQL 9.5
PostgreSQL 9.5 incorporates SELECT ... FOR UPDATE ... SKIP LOCKED. This makes implementing working queuing systems a lot simpler and easier. You may no longer require an external queueing system since it's now simple to fetch 'n' rows that no other sess...
Difference between sh and bash
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Some Bash keywords like local, source, function, shopt, let, declare, and select are not portable to sh. (Some sh implementations support e.g. local.)
Bash has many C-style syntax extensions like the three-argument for((i=0;i<=3;i++)) loop, += increment assignment, etc. The $'string\nwith\tC\aes...
How do I determine the size of an object in Python?
... and module Class Tracker provides off-line analysis of the lifetime of
selected Python objects.
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Is cout synchronized/thread-safe?
...cent version of MSVC (currently for VS 2010/MSVC 10/cl.exe 16.x). You can select the information for older versions of MSVC using a dropdown control on the page (and the information is different for older versions).
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GUI not working after rewriting to MVC
...he Model manages a single Piece, chosen at random. In response to a user's selection, the View invokes the check() method, while listening for a response from the Model via update(). The View then updates itself using information obtained from the Model. Similarly, the Controller may reset() the Mod...
Hide keyboard when scroll UITableView
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You can do this right in Interface Builder. Select your UITableView and open the Attributes Inspector. In the Scroll View section set the Keyboard field to Dismiss on Drag.
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How can I check if an element exists in the visible DOM?
...to the original question).
That's as simple as using any of the browser's selecting method, and checking it for a truthy value (generally).
For example, if my element had an id of "find-me", I could simply use...
var elementExists = document.getElementById("find-me");
This is specified to eithe...
JQuery: How to call RESIZE event only once it's FINISHED resizing?
...ndler. It attaches an event handler function for one or more events to the selected elements if the event was not triggered for a given interval. This is useful if you want to fire a callback only after a delay, like the resize event, or else.
https://github.com/yckart/jquery.unevent.js
;(function ...
What's the equivalent of use-commit-times for git?
... file .mtimes in git repository, updates them accordingly on commits (jsut selectively the mtimes of staged files) and applies them on checkout. It works even with cygwin/mingw versions of git (but you may need to copy some files from standard cygwin into git's folder)
The solution consists of 3 fi...