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What is a word boundary in regex?
...parse numeric output, among other purposes) and cannot find a precise definition of \b ("word boundary"). I had assumed that -12 would be an "integer word" (matched by \b\-?\d+\b ) but it appears that this does not work. I'd be grateful to know of ways of matching space-separated numbers.
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What do 'real', 'user' and 'sys' mean in the output of time(1)?
...sed by other processes and time the process spends blocked (for example if it is waiting for I/O to complete).
User is the amount of CPU time spent in user-mode code (outside the kernel) within the process. This is only actual CPU time used in executing the process. Other processes and time the pr...
Convert Iterable to Stream using Java 8 JDK
I have an interface which returns java.lang.Iterable<T> .
9 Answers
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Python list subtraction operation
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Use a list comprehension:
[item for item in x if item not in y]
If you want to use the - infix syntax, you can just do:
class MyList(list):
def __init__(self, *args):
super(MyList, self).__init__(args)
def __sub__(self, other):
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Propagate all arguments in a bash shell script
I am writing a very simple script that calls another script, and I need to propagate the parameters from my current script to the script I am executing.
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Are Mutexes needed in javascript?
...entation. Functions like setTimeout() and asynchronous callbacks need to wait for the script engine to sleep before they're able to run.
That means that everything that happens in an event must be finished before the next event will be processed.
That being said, you may need a mutex if your code ...
gulp globbing- how to watch everything below directory
...es under all directories is usually ./src/less/**/*.* or ./src/less/**/*, either should work.
Generally speaking, it's better to match specific files extensions — even if they should all be the same — to prevent grabbing system files or other junk. In that case, you can do ./src/less/**/*.less...
What is the best way to repeatedly execute a function every x seconds?
...effectively like calling the python script every minute using a cron, but without requiring that to be set up by the user.
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Case insensitive XPath contains() possible?
...acters you expect to see.
If you can, mark the text that interests you with some other means, like enclosing it in a <span> that has a certain class while building the HTML. Such things are much easier to locate with XPath than substrings in the element text.
If that's not an option, you c...
How to test an SQL Update statement before running it?
...oduction can save the day. However a borked update can be worse than the initial problem.
8 Answers
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