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Why is there no String.Empty in Java?
...to use StringBuilder rather than concatenation.
– Randolpho
Aug 10 '10 at 15:36
87
I tend to pref...
How do I convert seconds to hours, minutes and seconds?
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By using the divmod() function, which does only a single division to produce both the quotient and the remainder, you can have the result very quickly with only two mathematical operations:
m, s = divmod(seconds, 60)
h, m = divmod(m, 60)
And then use string fo...
Remove Elements from a HashSet while Iterating [duplicate]
...ve(). If an entry is removed via Set.remove() while an iteration is being done, you will get a ConcurrentModificationException. On the other hand, removal of entries via Iterator.remove() while iteration is supported in this case.
The new for loop is nice, but unfortunately it does not work in th...
How to get rid of the 'undeclared selector' warning
...c push #pragma clang diagnostic ignored "-Wundeclared-selector" // Do your thing #pragma clang diagnostic pop
– dizy
Aug 21 '13 at 3:50
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How do you see the entire command history in interactive Python?
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Everytime I forget, how this is done, I come here for the answer, thank you Dennis.
– Felipe Valdes
Feb 11 '18 at 2:31
3
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How to put a line comment for a multi-line command [duplicate]
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I'm afraid that, in general, you can't do what you're asking for. The best you can do is a comment on the lines before the command, or one single comment at the end of the command line, or a comment after the command.
You can't manage to intersperse comments insi...
'pip' is not recognized as an internal or external command
...setx PATH "%PATH%;C:\Python34\Scripts"
Note:
According to the official documentation, "[v]ariables set with setx variables are available in future command windows only, not in the current command window". In particular, you will need to start a new cmd.exe instance after entering the above comma...
live output from subprocess command
...ation, I use subprocess.Popen to run the code, collect the output from stdout and stderr into a subprocess.PIPE --- then I can print (and save to a log-file) the output information, and check for any errors. The problem is, I have no idea how the code is progressing. If I run it directly from ...
How do I return rows with a specific value first?
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@chaos: the above statement does indeed not run with SQL Server, but that's because the syntax is non-standard and only works for MySQL. When using a CASE statement (which is standard SQL) SQL Server can very well use an expression in the ORDER BY claus...
Pretty printing JSON from Jackson 2.2's ObjectMapper
...of the results of my Google searches have come up with Jackson 1.x ways of doing this and I can't seem to find the proper, non-deprecated way of doing this with 2.2. Even though I don't believe that code is absolutely necessary for this question, here's what I have right now:
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