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What generates the “text file busy” message in Unix?
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12 Answers
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How exactly does CMake work?
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edited Aug 10 '18 at 18:56
Matt Montag
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IF statement: how to leave cell blank if condition is false (“” does not work)
...the condition is FALSE.
Note that, if the following formula is entered in C1 ( for which the condition is false ) for example:
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Do Java arrays have a maximum size?
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188
Haven't seen the right answer, even though it's very easy to test.
In a recent HotSpot VM, th...
Search and replace in bash using regular expressions
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181
Use sed:
MYVAR=ho02123ware38384you443d34o3434ingtod38384day
echo "$MYVAR" | sed -e 's/[a-zA-Z...
django test app error - Got an error creating the test database: permission denied to create databas
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edited Jan 7 '19 at 21:15
answered Jan 6 '13 at 20:31
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How do I use a file grep comparison inside a bash if/else statement?
...elp, but also see man grep:
Exit status is 0 if any line was selected, 1 otherwise;
if any error occurs and -q was not given, the exit status is 2.
if grep --quiet MYSQL_ROLE=master /etc/aws/hosts.conf; then
echo exists
else
echo not found
fi
You may want to use a more specific regex, ...
How to trim leading and trailing white spaces of a string?
... := strings.TrimSpace(s)
fmt.Printf("%d %q\n", len(t), t)
}
Output:
16 "\t Hello, World\n "
12 "Hello, World"
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When should Flask.g be used?
... that g will move from the request context to the app context in Flask 0.10, which made me confused about the intended use of g .
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Validate uniqueness of multiple columns
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321
You can scope a validates_uniqueness_of call as follows.
validates_uniqueness_of :user_id, :sc...