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Appending a line to a file only if it does not already exist
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Is there a way to “autosign” commits in Git with a GPG key?
Is there an easy way to make Git always signs each commit or tag that is created?
5 Answers
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.NET String.Format() to add commas in thousands place for a number
I want to add a comma in the thousands place for a number.
21 Answers
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How to find all positions of the maximum value in a list?
I have a list:
17 Answers
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Regular expression to match a line that doesn't contain a word
I know it's possible to match a word and then reverse the matches using other tools (e.g. grep -v ). However, is it possible to match lines that do not contain a specific word, e.g. hede , using a regular expression?
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How to sum array of numbers in Ruby?
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Can a C++ enum class have methods?
I have an enum class with two values, and I want to create a method which receives a value
and returns the other one. I also want to maintain type safety(that's why I use enum class instead of enums).
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How to duplicate a whole line in Vim?
...g percentage of users maps Y to y$. (Consistent with D and C; (but not Vi compatible (no one cares.))) That is even proposed in :help Y.
– Aaron Thoma
Jan 19 '14 at 2:48
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Rails and PostgreSQL: Role postgres does not exist
I have installed PostgreSQL on my Mac OS Lion, and am working on a rails app. I use RVM to keep everything separate from my other Rails apps.
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