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How do I reference an existing branch from an issue in GitHub?
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edited Jun 20 at 9:12
Community♦
111 silver badge
answered Nov 4 '11 at 11:23
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How to extract the first two characters of a string in shell scripting?
...er expansion:
pax> long="USCAGol.blah.blah.blah"
pax> short="${long:0:2}" ; echo "${short}"
US
This will set short to be the first two characters of long. If long is shorter than two characters, short will be identical to it.
This in-shell method is usually better if you're going to be doi...
SELECT * WHERE NOT EXISTS
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160
You didn't join the table in your query.
Your original query will always return nothing unless ...
Bash script absolute path with OS X
... [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
}
realpath "$0"
This prints the path verbatim if it begins with a /. If not it must be a relative path, so it prepends $PWD to the front. The #./ part strips off ./ from the front of $1.
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Maven2: Best practice for Enterprise Project (EAR file)
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So as an example you might do something like this:
<?xml version="1.0" encoding="utf-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.x...
throw new std::exception vs throw std::exception
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90
The conventional way to throw and catch exceptions is to throw an exception object and to catch ...
Cannot change column used in a foreign key constraint
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edited Aug 9 '17 at 20:53
Jacob Bond
21511 silver badge1010 bronze badges
answered Nov 28 '12 at 13...
Guid.NewGuid() vs. new Guid()
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new Guid() makes an "empty" all-0 guid (00000000-0000-0000-0000-000000000000 is not very useful).
Guid.NewGuid() makes an actual guid with a unique value, what you probably want.
s...
Practical example where Tuple can be used in .Net 4.0?
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Appulus
17.1k1010 gold badges3333 silver badges4343 bronze badges
answered Apr 30 '10 at 15:04
tanasciustanascius
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Scala: What is a TypeTag and how do I use it?
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+50
A TypeTag solves the problem that Scala's types are erased at runtime (type erasure). If we wanna do
class Foo
class Bar extends Foo
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