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Hidden Features of PHP? [closed]
...n gets my vote. I haven't encountered a more thorough online documentation for a programming language - everything else I have to piece together from various websites and man pages.
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Kotlin secondary constructor
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Update: Since M11 (0.11.*) Kotlin supports secondary constructors.
For now Kotlin supports only primary constructors (secondary constructors may be supported later).
Most use cases for secondary constructors are solved by one of the techniques below:
Technique 1. (solves your case) Define ...
Undefined reference to `pow' and `floor'
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Thanks! I've been googling for the past 30 minutes and this is the first reference that said to link the libraries after the objects
– Dave Baghdanov
Nov 6 '13 at 22:13
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Error handling in Bash
...s predictability and portability).
You can either let the trap call error for you (in which case it uses the default exit code of 1 and no message) or call it yourself and provide explicit values; for instance:
error ${LINENO} "the foobar failed" 2
will exit with status 2, and give an explicit m...
Delete files older than 15 days using PowerShell
...y empty directories that may have been left behind. My code also uses the -Force option to delete hidden and read-only files as well. Also, I chose to not use aliases as the OP is new to PowerShell and may not understand what gci, ?, %, etc. are.
$limit = (Get-Date).AddDays(-15)
$path = "C:\Some\Pa...
C++11 reverse range-based for-loop
...of iterators so I can iterate over a container in reverse with range-based for-loop?
8 Answers
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Serializing object that contains cyclic object value
...ments, this code removes every "seen" object, not only "recursive" ones.
For example, for:
a = {x:1};
obj = [a, a];
the result will be incorrect. If your structure is like this, you might want to use Crockford's decycle or this (simpler) function which just replaces recursive references with nu...
Understanding the main method of python [duplicate]
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Using this convention one can have a file define classes and functions for use in other programs, and also include code to evaluate only when the file is called as a standalone script.
It's important to understand that all of the code above the if __name__ line is being executed, evaluated, in ...
What are 'closures' in .NET?
...e's always more to learn :) I've just finished reading CLR via C# - very informative. Other than that, I usually ask Marc Gravell for WCF/binding/expression trees, and Eric Lippert for C# language things.
– Jon Skeet
Jan 9 '09 at 16:18
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What is the effect of extern “C” in C++?
...ration of your function. Your function definition is contained in a binary format (that was compiled by your C++ compiler) that the client C linker will then link to using the C name.
Since C++ has overloading of function names and C does not, the C++ compiler cannot just use the function name as a ...