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Shell equality operators (=, ==, -eq)
Can someone please explain the difference between = , == and -eq in shell scripting?
4 Answers
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Select count(*) from multiple tables
...lect count(*) from two different tables (call them tab1 and tab2 ) having as result:
18 Answers
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How to generate a random alpha-numeric string?
I've been looking for a simple Java algorithm to generate a pseudo-random alpha-numeric string. In my situation it would be used as a unique session/key identifier that would "likely" be unique over 500K+ generation (my needs don't really require anything much more sophisticated).
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Why generate long serialVersionUID instead of a simple 1L?
When class implements Serializable in Eclipse, I have two options: add default serialVersionUID(1L) or generated serialVersionUID(3567653491060394677L) . I think that first one is cooler, but many times I saw people using the second option. Is there any reason to generate long serialVersionUID ?...
How to create new tmux session if none exists
I am trying to figure out how to attach to a tmux session if a named tmux session exists, if not I want to create a new one with the given name.
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Reading header data in Ruby on Rails
I am making an API where in the access token for Facebook login will be sent in through header data.
3 Answers
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Base64: What is the worst possible increase in space usage?
If a server received a base64 string and wanted to check it's length before converting,, say it wanted to always permit the final byte array to be 16KB. How big could a 16KB byte array possibly become when converted to a Base64 string (assuming one byte per character)?
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Clean up a fork and restart it from the upstream
...pository, then I made some changes and it looks like I've messed up everything.
4 Answers
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Git hangs while writing objects
I'm trying to git push -u origin master And it just hangs at
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UIViewContentModeScaleAspectFill not clipping
I'm trying to draw some thumbnail images at a fixed size (100x100) using UIImageView . I've set the frame size of my image view to be 100x100, and set the contentMode to UIViewContentModeScaleAspectFill .
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