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Understanding repr( ) function in Python
...gt;>> x
'foo'
So the name x is attached to 'foo' string. When you call for example repr(x) the interpreter puts 'foo' instead of x and then calls repr('foo').
>>> repr(x)
"'foo'"
>>> x.__repr__()
"'foo'"
repr actually calls a magic method __repr__ of x, which gives the s...
What is the (function() { } )() construct in JavaScript?
...tion expression. Then look at the last pair (function(){})();, this is normally added to an expression to call a function; in this case, our prior expression.
This pattern is often used when trying to avoid polluting the global namespace, because all the variables used inside the IIFE (like in any ...
What is the Python equivalent of Matlab's tic and toc functions?
...e stuff
Sometimes I find this technique more convenient than timeit - it all depends on what you want to measure.
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Creating a new dictionary in Python
I want to build a dictionary in Python. However, all the examples that I see are instantiating a dictionary from a list, etc . ..
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How do search engines deal with AngularJS applications?
...g tabs. The tabs hide and show content, and the content is inserted dynamically, either using AJAX or by simply setting display:none and display:block to hide and show the correct tab content.
When the tabs are clicked, use pushState to update the url in the address bar. When the page is rendered, ...
Why does sys.exit() not exit when called inside a thread in Python?
...and I'm confused as to why the following code snippet would not exit when called in the thread, but would exit when called in the main thread.
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How to deal with INSTALL_PARSE_FAILED_INCONSISTENT_CERTIFICATES without uninstall?
I tried to reinstall an apk
16 Answers
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What is the difference between #import and #include in Objective-C?
... decent header files protect themselves against this anyway, so it's not really that much of a benefit.
Basically, it's up to you to decide which you want to use. I tend to #import headers for Objective-C things (like class definitions and such) and #include standard C stuff that I need. For exampl...
Android NDK C++ JNI (no implementation found for native…)
...g the function prototype name wrong, another is failing to load the .so at all. Are you sure that System.loadLibrary() is being called before the method is used?
If you don't have a JNI_OnLoad function defined, you may want to create one and have it spit out a log message just to verify that the l...
Possibility of duplicate Mongo ObjectId's being generated in two different collections?
...que ID (please let me know if there are more):
Before this discussion, recall that the BSON Object ID consists of:
[4 bytes seconds since epoch, 3 bytes machine hash, 2 bytes process ID, 3 bytes counter]
Here are the three possibilities, so you judge for yourself how likely it is to get a dupe:
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