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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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Who is “us” and who is “them” according to Git?
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178
When you merge, us refers to the branch you're merging into, as opposed to them, the branch to...
How to convert an enum type variable to a string?
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ASP.NET MVC: Is Controller created for every request?
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104
A Controller is created for every request by the ControllerFactory (which by default is the De...
Can you call ko.applyBindings to bind a partial view?
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431
ko.applyBindings accepts a second parameter that is a DOM element to use as the root.
This woul...
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...
Removing a model in rails (reverse of “rails g model Title…”)
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194
bundle exec rake db:rollback
rails destroy model <model_name>
When you generate a ...
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...