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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:
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How to do something to each file in a directory with a batch script
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Transferring an app to another Firebase account
I have a few apps under my personal firebase account for testing, but now need to transfer an app to a client's account for billing purposes. Is this possible?
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Swift Beta performance: sorting arrays
I was implementing an algorithm in Swift Beta and noticed that the performance was very poor. After digging deeper I realized that one of the bottlenecks was something as simple as sorting arrays. The relevant part is here:
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Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
I have no idea why these lines of code return different values:
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PHP json_decode() returns NULL with valid JSON?
I have this JSON object stored on a plain text file:
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400 BAD request HTTP error code meaning?
I have a JSON request which I'm posting to a HTTP URL.
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What does string::npos mean in this code?
What does the phrase std::string::npos mean in the following snippet of code?
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Hashing a file in Python
I want python to read to the EOF so I can get an appropriate hash, whether it is sha1 or md5. Please help. Here is what I have so far:
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Math - mapping numbers
How do I map numbers, linearly, between a and b to go between c and d.
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