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Append value to empty vector in R?
...length(values)) vector[i] <- values[i] )
# user system elapsed
# 0.340 0.000 0.343
vector <- character(length(values))
# fast(er)
system.time( for (i in 1:length(values)) vector[i] <- values[i] )
# user system elapsed
# 0.024 0.000 0.023
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How do you reverse a string in place in C or C++?
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30 Answers
30
Active
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C++STL容器使用经验总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...hash_map和hash_multimap。
vector<char> 作为string的替代。(见第13条)
vector作为标准关联容器的替代。(见第23条)
几种标准的非STL容器，包括数组、bitset、valarray、stack、queue和priority_queue。
你是否关心容器中的元素是如何排序的？如果...
Why is it wrong to use std::auto_ptr with standard containers?
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edited Sep 4 '13 at 16:18
community wiki
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Ruby arrays: %w vs %W
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236
%w quotes like single quotes '' (no variable interpolation, fewer escape sequences), while %W q...
Elegant way to invert a map in Scala
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answered Feb 25 '10 at 23:59
Daniel C. SobralDaniel C. Sobral
280k8282 gold badges469469 silver badges666666 bronze badges
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What's the need of array with zero elements?
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139
This is a way to have variable sizes of data, without having to call malloc (kmalloc in this ca...
How do you default a new class to public when creating it in Visual Studio?
... Files\Microsoft Visual Studio 9.0\Common7\IDE\ItemTemplates\CSharp\Code\1033.
Visual Studio 2010 (10.0) and below: There is a zip file in there called Class.zip. Unpack this, edit the file to put in your public keyword then re-pack it (make sure you backup the original).
After this, make sure VS...
Obfuscated C Code Contest 2006. Please explain sykes2.c
...g:
main(_) {
_^448 && main(-~_);
putchar(--_%64
? 32 | -~7[__TIME__-_/8%8][">'txiZ^(~z?"-48] >> ";;;====~$::199"[_*2&8|_/64]/(_&2?1:8)%8&1
: 10);
}
Introducing variables to untangle this mess:
main(int i) {
if(i^448)
main(-~i);
...