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Checking if output of a command contains a certain string in a shell script
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105
Test the return value of grep:
./somecommand | grep 'string' &> /dev/null
if [ $? == 0...
What rules does Pandas use to generate a view vs a copy?
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Rails: where does the infamous “current_user” come from?
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edited Aug 9 '14 at 19:46
answered Oct 4 '12 at 3:48
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Can an array be top-level JSON-text?
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127
Yes, an array is legal as top-level JSON-text.
There are three standard documents defining JS...
jQuery: what is the best way to restrict “number”-only input for textboxes? (allow decimal points)
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Percentage Height HTML 5/CSS
... of the div, including <html> and <body>, have to have height: 100%, so there is a chain of explicit percentage heights down to the div.
(*: or, if the div is positioned, the ‘containing block’, which is the nearest ancestor to also be positioned.)
Alternatively, all modern browser...
How to vertical align an inline-block in a line of text?
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code {
background: black;
color: white;
display: inline-block;
vertica...
What does the “~” (tilde/squiggle/twiddle) CSS selector mean?
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The ~ selector is in fact the General sibling combinator (renamed to Subsequent-sibling combi...
What's the opposite of head? I want all but the first N lines of a file
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tail --help gives the following:
-n, --lines=K output the last K lines, instead o...
How can I sanitize user input with PHP?
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