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Test for non-zero length string in Bash: [ -n “$var” ] or [ “$var” ]
I've seen Bash scripts test for a non-zero length string in two different ways. Most scripts use the -n option:
6 Answers...
What does the constant 0.0039215689 represent?
I keep seeing this constant pop up in various graphics header files
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How do I make a request using HTTP basic authentication with PHP curl?
I'm building a REST web service client in PHP and at the moment I'm using curl to make requests to the service.
11 Answers
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Resolve promises one after another (i.e. in sequence)?
Consider the following code that reads an array of files in a serial/sequential manner. readFiles returns a promise, which is resolved only once all files have been read in sequence.
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Ruby function to remove all white spaces?
What is the Ruby function to remove all white spaces? I'm looking for something kind of like PHP's trim() ?
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CSS opacity only to background color, not the text on it? [duplicate]
Can I assign the opacity property to the background property of a div only and not to the text on it?
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C-like structures in Python
Is there a way to conveniently define a C-like structure in Python? I'm tired of writing stuff like:
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How do you get git to always pull from a specific branch?
I'm not a git master, but I have been working with it for some time now, with several different projects. In each project, I always git clone [repository] and from that point, can always git pull , so long as I don't have outstanding changes, of course.
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Escape double quote character in XML
Is there an escape character for a double quote in xml? I want to write a tag like:
8 Answers
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switch case statement error: case expressions must be constant expression
My switch-case statement works perfectly fine yesterday. But when I run the code earlier this morning eclipse gave me an error underlining the case statements in color red and says: case expressions must be constant expression, it is constant I don't know what happened. Here's my code below:
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