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PHP: How to send HTTP response code?
...ponses with HTTP response codes (status-codes), like HTTP 200 OK, or some 4XX or 5XX code.
9 Answers
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Why does 2 mod 4 = 2?
...ign % is often used for the modulo operator, in lieu of the word mod.
For x % 4, you get the following table (for 1-10)
x x%4
------
1 1
2 2
3 3
4 0
5 1
6 2
7 3
8 0
9 1
10 2
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How to get a random value from dictionary in python
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That will work in Python 2.x where d.keys() is a list, but it won't work in Python 3.x where d.keys() is an iterator. You should do random.choice(list(d.keys())) instead.
– Duncan
Feb 1 '11 at 9:42
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How to tell bash that the line continues on the next line
In a bash script I got from another programmer, some lines exceeded 80 columns in length. What is the character or thing to be added to the line in order to indicate that the line continues on the next line?
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How to add custom validation to an AngularJS form?
...the required attributes and such. But for some fields I need to do some extra validation. How would I "tap in" to the validation that FormController controls?
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Why would a JavaScript variable start with a dollar sign? [duplicate]
...variables that start with a dollar sign. When/why would you choose to prefix a variable in this way?
16 Answers
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Getting a list of all subdirectories in the current directory
...ach subdirectory. Ths first entry in the 3-tuple is a directory name, so
[x[0] for x in os.walk(directory)]
should give you all of the subdirectories, recursively.
Note that the second entry in the tuple is the list of child directories of the entry in the first position, so you could use this i...
WPF chart controls [closed]
...zation library. Unfortunately it's not been updated since April 30, 2009.
OxyPlot
Free tools without built in pan / zoom support:
WPF Toolkit. Supports most important 2D charts, you'll have to implement pan / zoom yourself.
WPF Toolkit Development Release. Supports stacked charts, equivalent to th...
A command-line HTML pretty-printer: Making messy HTML readable [closed]
...ere is its GitHub repository.
Tidy is a console application for Mac OS X, Linux, Windows, UNIX, and more. It corrects and cleans up HTML and XML documents by fixing markup errors and upgrading legacy code to modern standards.
For your needs, here is the command line to call Tidy:
tidy inputfi...
How can I specify the base for Math.log() in JavaScript?
...e 10 can be calculated
with the following identity.
Since Math.log(x) in JavaScript returns the natural logarithm of x (same as ln(x)), for base 10 you can divide by Math.log(10) (same as ln(10)):
function log10(val) {
return Math.log(val) / Math.LN10;
}
Math.LN10 is a built-in precompu...