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How to move all files including hidden files into parent directory via *
...ning" may not always be a good idea. Right now I'm having a problem with a script in which I need to stop execution if any step fails - since this solution always causes an error, it kills my script. I need a way to determine if the mv command failed or not...
– MarioVilas
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Check if a program exists from a Makefile
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My solution involves a little helper script1 that places a flag file if all required commands exist. This comes with the advantage that the check for the required commands is only done once and not on every make invocation.
check_cmds.sh
#!/bin/bash
NEEDED_CO...
Why is $$ returning the same id as the parent process?
...matter if it's in a subshell or not.
$$ is an alias in Bash to the current script PID. See differences between $$ and $BASHPID here, and right above that the additional variable $BASH_SUBSHELL which contains the nesting level.
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How to drop columns using Rails migration
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For older versions of Rails
ruby script/generate migration RemoveFieldNameFromTableName field_name:datatype
For Rails 3 and up
rails generate migration RemoveFieldNameFromTableName field_name:datatype
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How to set versionName in APK filename using gradle?
...increment) value. Any way to make sure this takes affect after the gradle script increment the version number?
– Guy
Aug 30 '14 at 18:06
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Android - Launcher Icon Size
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I've created a script that exports Android launcher icons at velara3.com and from my research XXHDPI is 180x180 not 144. See developer.android.com/guide/practices/screens_support.html. Search on the page for, "180x180 (3.0x) for extra-extra...
Trying to embed newline in a variable in bash [duplicate]
...ady inserted.
$ var="a
> b
> c"
$ echo "$var"
a
b
c
Or, inside an script code:
var="a
b
c"
Yes, that means writing Enter where needed in the code.
1.2. Create using shell quoting.
The sequence $' is an special shell expansion in bash and zsh.
var=$'a\nb\nc'
The line is parsed by t...
In Python, what happens when you import inside of a function? [duplicate]
... Importing a module for the first time is expensive. Try running an empty script vs one containing just import string,itertools,fractions,heapq,re,array,bisect,collections,math,os. The first takes an average of 180 ms, and the second 230 ms. So it's not microseconds for starters. It's tens of milli...
How to check if a file is a valid image file?
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Update
I also implemented the following solution in my Python script here on GitHub.
I also verified that damaged files (jpg) frequently are not 'broken' images i.e, a damaged picture file sometimes remains a legit picture file, the original image is lost or altered but you are still a...
Map a network drive to be used by a service
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Very informative... Am I correct in assuming that logon scripts are also run only for interactive logon sessions and not for service sessions?
– VoidPointer
Oct 8 '08 at 13:55
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