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Best way to test for a variable's existence in PHP; isset() is clearly broken
... This looks a bit ugly to me, but in the case where you're actually checking an array element, it makes much more sense: isset($foo[$bar]) becomes array_key_exists($bar, $foo)
– Arild
Aug 25 '14 at 14:12
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How to dump a dict to a json file?
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you can supply all those parameters to dump(sample, file, ...) too. The extra step of writing to a string is not needed. dump internally writes in chunks. This could be more efficient than to compile a (possibly huge) string first.
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How to completely uninstall Visual Studio 2010?
...ly and ultimately remove Visual Studio 2010 from my computer. When you install Visual Studio, it also installs a bunch of programs (about 55) in the add/remove programs panel ( appwiz.cpl ).
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CoInitialize浅析一 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
... mov ecx, [eax+0Ch]
769AEFC2 test ch, 10h ;判断标识第4位（从第0位开始）是否置位
769AEFC5 jnz loc_769D9D20 ; 服务器出现意外情况。
769AEFCB mov edx, ebx
769AEFCD ...
Show all Elasticsearch aggregation results/buckets and not just 10
I'm trying to list all buckets on an aggregation, but it seems to be showing only the first 10.
4 Answers
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Correct way to write line to file?
...ing files opened in text mode (the default); use a single '\n' instead, on all platforms.
Some useful reading:
The with statement
open()
'a' is for append, or use
'w' to write with truncation
os (particularly os.linesep)
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What's wrong with nullable columns in composite primary keys?
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Primary keys are for uniquely identifying rows. This is done by comparing all parts of a key to the input.
Per definition, NULL cannot be part of a successful comparison. Even a comparison to itself (NULL = NULL) will fail. This means a key containing NULL would not work.
Additonally, NULL is al...
Why declare a struct that only contains an array in C?
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It allows you to pass the array to a function by value, or get it returned by value from a function.
Structs can be passed by value, unlike arrays which decay to a pointer in these contexts.
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CMake unable to determine linker language with C++
...d (according to the documentation), but it wasn't helpful to me:
Optionally you can specify which languages your project supports.
Example languages are CXX (i.e. C++), C, Fortran, etc. By default C
and CXX are enabled. E.g. if you do not have a C++ compiler, you can
disable the check for ...
How do you find the current user in a Windows environment?
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The extra information with all the environment variables makes this a wonderful extended answer.
– bballdave025
May 21 at 19:32
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