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An example of how to use getopts in bash
...t;0 (for the sake of simplicity I didn't differentiate between those cases and nobody forces you to print the usage text in the latter case). I have seen programs which always return != 0, though, even on -h/--help. Maybe I should update the snippet in case people use this as boilerplate (I hope not...
Is a Python list guaranteed to have its elements stay in the order they are inserted in?
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what if I return a local list from a function and use that in the calling function. That is def fn_1(): lst = [] lst.append(1) lst.append(2) return lst and def fn_2(): print(fn_1()) Will the order be same ALWAYS irrespective of how many times or where ever I use fn_1() ?...
How to make child process die after parent exits?
...t when its parent dies. This value is cleared for the child of a fork(2) and (since Linux 2.4.36 / 2.6.23) when executing a set-user-ID or set-group-ID binary.
– qrdl
Dec 10 '16 at 19:46
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What's with 181783497276652981 and 8682522807148012 in Random (Java 7)?
Why were 181783497276652981 and 8682522807148012 chosen in Random.java ?
3 Answers
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Math.random() explanation
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int randomWithRange(int min, int max)
{
int range = (max - min) + 1;
return (int)(Math.random() * range) + min;
}
Output of randomWithRange(2, 5) 10 times:
5
2
3
3
2
4
4
4
5
4
The bounds are inclusive, ie [2,5], an...
Git Alias - Multiple Commands and Parameters
I am trying to create an alias that uses both multiple Git commands and positional parameters. There are Stackoverflow pages for each, and it would appear painfully obvious to do both, but I am having trouble.
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unix - head AND tail of file
Say you have a txt file, what is the command to view the top 10 lines and bottom 10 lines of file simultaneously?
20 Answer...
How to get a string after a specific substring?
...ring.split("world",1)[1]
split takes the word(or character) to split on and optionally a limit to the number of splits.
In this example split on "world" and limit it to only one split.
share
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i...
StringIO in Python3
I am using Python 3.2.1 and I can't import the StringIO module. I use
io.StringIO and it works, but I can't use it with numpy 's genfromtxt like this:
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Find and restore a deleted file in a Git repository
Say I'm in a Git repository. I delete a file and commit that change. I continue working and make some more commits. Then, I find I need to restore that file.
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