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How do I choose a HTTP status code in REST API for “Not Ready Yet, Try Again Later”? [closed]
... time. There's a batch process in the server that generates all the blobs for all the thingies. Thingy 1234 already exists and its data, other than the blob, is already available. The server hasn't got to generating thingy 1234's blob yet.
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How can I determine if a variable is 'undefined' or 'null'?
How do I determine if variable is undefined or null ?
30 Answers
30
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What is the difference between
...rackets; not sent to client (as opposed to HTML comments).
Visit Ruby Doc for more infos about ERB.
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When to wrap quotes around a shell variable?
Could someone tell me whether or not I should wrap quotes around variables in a shell script?
5 Answers
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&& (AND) and || (OR) in IF statements
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No, it will not be evaluated. And this is very useful. For example, if you need to test whether a String is not null or empty, you can write:
if (str != null && !str.isEmpty()) {
doSomethingWith(str.charAt(0));
}
or, the other way around
if (str == null || str.isEmpt...
Iterator invalidation rules
What are the iterator invalidation rules for C++ containers?
6 Answers
6
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Ignoring directories in Git repositories on Windows
How can I ignore directories or folders in Git using msysgit on Windows?
18 Answers
18...
Why don't they teach these things in school? [closed]
Over the summer, I was fortunate enough to get into Google Summer of Code. I learned a lot (probably more than I've learned in the sum of all my university coursework). I'm really wondering why they don't teach a few of the things I learned sooner in school though. To name a few:
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How should strace be used?
...ly find out how a program is interacting with the OS. It does this by monitoring system calls and signals.
Uses
Good for when you don't have source code or don't want to be bothered to really go through it.
Also, useful for your own code if you don't feel like opening up GDB, but are just intereste...
Python: try statement in a single line
...variables to something. If they might not get set, set them to None first (or 0 or '' or something if it is more applicable.)
If you do assign all the names you are interested in first, you do have options.
The best option is an if statement.
c = None
b = [1, 2]
if c is None:
a = b
else:...