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Can the Unix list command 'ls' output numerical chmod permissions?
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it almost can ..
ls -l | awk '{k=0;for(i=0;i<=8;i++)k+=((substr($1,i+2,1)~/[rwx]/) \
*2^(8-i));if(k)printf("%0o ",k);print}'
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Count occurrences of a char in plain text file
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178
How about this:
fgrep -o f <file> | wc -l
Note: Besides much easier to remember/dupli...
Keep only first n characters in a string?
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edited Apr 12 '14 at 11:37
andrewb
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Is there a splice method for strings?
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10 Answers
10
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Returning value from called function in a shell script
...also true for some other shells.
Here's how to do each of those options:
1. Echo strings
lockdir="somedir"
testlock(){
retval=""
if mkdir "$lockdir"
then # Directory did not exist, but it was created successfully
echo >&2 "successfully acquired lock: $lockdir"
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Maven dependency for Servlet 3.0 API?
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10 Answers
10
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How to test multiple variables against a value?
...bout the same comparison for all names here. You are looking for:
if x == 1 or y == 1 or z == 1:
x and y are otherwise evaluated on their own (False if 0, True otherwise).
You can shorten that using a containment test against a tuple:
if 1 in (x, y, z):
or better still:
if 1 in {x, y, z}:
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Python: print a generator expression?
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163
Quick answer:
Doing list() around a generator expression is (almost) exactly equivalent to ha...
Add single element to array in numpy
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167
append() creates a new array which can be the old array with the appended element.
I think it...