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What is the best way to conditionally apply a class?
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1385
If you don't want to put CSS class names into Controller like I do, here is an old trick that...
git: How to diff changed files versus previous versions after a pull?
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159
There are all kinds of wonderful ways to specify commits - see the specifying revisions sectio...
What is a “surrogate pair” in Java?
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131
The term "surrogate pair" refers to a means of encoding Unicode characters with high code-poin...
Specify width in *characters*
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1em is the height of an M, rather than the width. Same holds for ex, which is the height of an x. More generally speaking, these are the heights of uppercase and lowercase letters.
Width is a totally different issue....
Cha...
Generate a random double in a range
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To generate a random value between rangeMin and rangeMax:
Random r = new Random();
double rando...
Is there StartsWith or Contains in t sql with variables?
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StartsWith
a) left(@edition, 15) = 'Express Edition'
b) charindex('Express Edition', @edition...
What is the 'pythonic' equivalent to the 'fold' function from functional programming?
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119
The Pythonic way of summing an array is using sum. For other purposes, you can sometimes use s...
Java HashMap performance optimization / alternative
...around 20,000 codes for 26 million distinct objects. That is an average of 1,300 objects per hash bucket = very very bad. However if I turn the two arrays into a number in base 52 I am guaranteed to get a unique hash code for every object:
public int hashCode() {
// assume that both a an...
Mapping over values in a python dictionary
Given a dictionary { k1: v1, k2: v2 ... } I want to get { k1: f(v1), k2: f(v2) ... } provided I pass a function f .
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