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What is the purpose of the : (colon) GNU Bash builtin?
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$ ./vecho
$ VERBOSE=1 ./vecho
Verbose echo is ON
This makes for a clean script. This cannot be done with '#'.
Also,
: >afile
is one of the simplest ways to guarantee that 'afile' exists but is 0 length.
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Looping through a hash, or using an array in PowerShell
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Shorthand is not preferred for scripts; it is less readable. The %{} operator is considered shorthand. Here's how it should be done in a script for readability and reusability:
Variable Setup
PS> $hash = @{
a = 1
b = 2
c = 3
}
PS> $hash...
Download File to server from URL
...e. If allow_fopen_url Off is set in php.ini (good idea for security), your script would be broken.
– PleaseStand
Oct 15 '10 at 0:43
4
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sed beginner: changing all occurrences in a folder
...res of sed that are specific to linux or BSD. Instead I use the overwrite script from Kernighan and Pike's book on the Unix Programming Environment.
The command is then
find /the/folder -type f -exec overwrite '{}' sed 's/old/new/g' {} ';'
And the overwrite script (which I use all over the plac...
Styles.Render in MVC4
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This is talking about styles, not scripts. If you want to use bootstrap.min.js, just create a bundle like this: bundles.Add(new ScriptBundle("~/bundles/bootstrap").Include( "~/Scripts/bootstrap.min.js"));
– Xcalibur...
socket.io and session?
...n exposes the app to XSS attacks by exposing the session ID at the client (scripting) level.
Check this solution instead (for Socket.IO >= v0.7). See docs here.
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CocoaPods Errors on Project Build
...red by Hlung's comment above, I realized that there were some dangling pod scripts that were attempting to run against some non-existent files. So I went to my target build phase, and deleted all the remaining phases that had anything to do with cocoa pods (and Hlung's comment he suggests deleting C...
Split output of command by columns using Bash?
... be executed in an environment that does not pass variables to the calling script.
out=$(ps whatever | { read a b c d; echo $c; })
arr=($(ps whatever | { read a b c d; echo $c $b; }))
echo ${arr[1]} # will output 'b'`
The Array Solution
So we then end up with the answer by @frayser which is...
Is there a point to minifying PHP?
...which is then interpreted on top of something resembling a VM. Many other scripting languages follow the same general process, including Perl and Ruby. It's not really a traditional interpreted language like, say, BASIC.
There would be no effective speed increase if you attempted to "minify" the ...
BAT file: Open new cmd window and execute a command in there
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This is not very easy.
The best approach is to have the part of your script that you want to be executed in a "new window" to be in a separate .bat file. This might be impractical if e.g. you need a lot of state from the rest of your script (variables, etc). One option is to pass any values yo...