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How to tell if JRE or JDK is installed
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160
You can open up terminal and simply type
java -version // this will check your jre version
jav...
How to use > in an xargs command?
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201
Do not make the mistake of doing this:
sh -c "grep ABC {} > {}.out"
This will break under...
How to initialize all members of an array to the same value in Swift?
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170
Actually, it's quite simple with Swift. As mentioned in the Apple's doc, you can initialize an a...
How to shorten my conditional statements
...t in other's code.
Instead of checking if the result of indexOf is >= 0, there is a nice little shortcut:
if ( ~[1, 2, 3, 4].indexOf(test.type) ) {
// Do something
}
Here is the fiddle: http://jsfiddle.net/HYJvK/
How does this work? If an item is found in the array, indexOf returns its ...
Is there a C# type for representing an integer Range?
...need to store an integer range. Is there an existing type for that in C# 4.0?
10 Answers
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How to get hex color value rather than RGB value?
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var hexDigits = new Array
("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");
//Function to convert rgb color to hex format
function rgb2hex(rgb) {
rgb = rgb.match(/^rgb\((\d+),\s*(\d+),\s*(\d+)\)$/);
return "#" + hex(rgb[1]) + hex(rg...
initialize a vector to zeros C++/C++11
...eed initialization lists for that:
std::vector<int> vector1(length, 0);
std::vector<double> vector2(length, 0.0);
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SVG drop shadow using css3
...ow.
Relevant bits from the example:
<filter id="dropshadow" height="130%">
<feGaussianBlur in="SourceAlpha" stdDeviation="3"/> <!-- stdDeviation is how much to blur -->
<feOffset dx="2" dy="2" result="offsetblur"/> <!-- how much to offset -->
<feComponentTran...
Reading output of a command into an array in Bash
...=$'\n' read -r -d '' -a my_array < <( my_command && printf '\0' )
Please make sure you use exactly this form, i.e., make sure you have the following:
IFS=$'\n' on the same line as the read statement: this will only set the environment variable IFS for the read statement only. So it...
Hour from DateTime? in 24 hours format
...he hour but show it in 24 hours format.
For example:
If the hour is 2:20:23 p.m. i want to convert it to 14:20 and that's it.
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