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How to check if a number is a power of 2
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1251
There's a simple trick for this problem:
bool IsPowerOfTwo(ulong x)
{
return (x & (x...
JavaScript replace/regex
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147
You need to double escape any RegExp characters (once for the slash in the string and once for...
Should I use a data.frame or a matrix?
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177
Part of the answer is contained already in your question: You use data frames if columns (vari...
How do I find out if first character of a string is a number?
... && c <= '9');
Or the slower regex solutions:
s.substring(0, 1).matches("\\d")
// or the equivalent
s.substring(0, 1).matches("[0-9]")
However, with any of these methods, you must first be sure that the string isn't empty. If it is, charAt(0) and substring(0, 1) will throw a StringIn...
Git: Merge a Remote branch locally
...r local branch:
git checkout master
git merge origin/aRemoteBranch
Note 1: For a large repo with a long history, you will want to add the --depth=1 option when you use git fetch.
Note 2: These commands also work with other remote repos so you can setup an origin and an upstream if you are workin...
Where is the “Fold” LINQ Extension Method?
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127
You will want to use the Aggregate extension method:
double product = doubles.Aggregate(1.0, ...
SQLite - increase value by a certain number
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1 Answer
1
Active
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How to get the seconds since epoch from the time + date output of gmtime()?
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126
If you got here because a search engine told you this is how to get the Unix timestamp, stop r...
creating list of objects in Javascript
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146
var list = [
{ date: '12/1/2011', reading: 3, id: 20055 },
{ date: '13/1/2011', readin...
django 1.5 - How to use variables inside static tag
...tic files references in my project to the new {% static %} tag that django 1.5 introduced, but I'm having a problem, in some places I use variables to get the content. With the new tag I can't, is there any way to solve this?
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