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...30000];
void main()
{
......
}
程序2:
int ar[300000] = {1, 2, 3, 4, 5, 6 };
void main()
{
......
}
发现程序2 编译之后所得的.exe 文件比程序1 的要大得多。当下甚为不解，于是手工编译了一下，并使用了/FAs 编译选项来查看了一下其各自...
How can I find out the current route in Rails?
... |
edited Nov 25 '13 at 14:08
answered Jul 30 '09 at 10:48
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Count the number of occurrences of a character in a string in Javascript
...f using a match better, but it is slower:
console.log(("str1,str2,str3,str4".match(/,/g) || []).length); //logs 3
console.log(("str1,str2,str3,str4".match(new RegExp("str", "g")) || []).length); //logs 4
jsfiddle
Use a regular expression literal if you know what you are searching for beforehand...
How can I convert string to datetime with format specification in JavaScript?
...
Samuel Liew♦
64.4k4040 gold badges132132 silver badges216216 bronze badges
answered Jan 24 '09 at 15:10
Rafael Muel...
What is the fastest or most elegant way to compute a set difference using Javascript arrays?
...'t know if this is most effective, but perhaps the shortest
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(function(x) { return B.indexOf(x) < 0 })
console.log(diff);
Updated to ES6:
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(x => !B.includes(x) );
console.log(diff);
...
Remove rows with duplicate indices (Pandas DataFrame and TimeSeries)
...subset='index', keep='first').set_index('index')
1000 loops, best of 3: 1.54 ms per loop
>>> %timeit df3.groupby(df3.index).first()
1000 loops, best of 3: 580 µs per loop
>>> %timeit df3[~df3.index.duplicated(keep='first')]
1000 loops, best of 3: 307 µs per loop
Note that you ...
How to sort in mongoose?
...
164
In Mongoose, a sort can be done in any of the following ways:
Post.find({}).sort('test').exec(f...
Where to host an Open Source Project: CodePlex, Google Code, SourceForge? [closed]
...
4 Answers
4
Active
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How to scale threads according to CPU cores?
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Ravindra babu
39.4k77 gold badges201201 silver badges180180 bronze badges
answered Dec 30 '09 at 15:51
JasCavJasCav
...
Recommendation for compressing JPG files with ImageMagick
...
449
I use always:
quality in 85
progressive (comprobed compression)
a very tiny gausssian blur t...