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How to change a command line argument in Bash?
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You have to reset all arguments. To change e.g. $3:
$ set -- "${@:1:2}" "new" "${@:4}"
Basically you set all arguments to their current values, except for the one(s) that you want to change. set -- is also specified by POSIX 7.
The "${@:1:2}" notation is expanded to the...
Ruby Metaprogramming: dynamic instance variable names
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edited Feb 6 '13 at 4:22
amacy
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answered Jul 19 '11 at 2...
What is the difference between svg's x and dx attribute?
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answered Oct 1 '13 at 22:52
Scott CameronScott Cameron
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How to import a module given its name as string?
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324
With Python older than 2.7/3.1, that's pretty much how you do it.
For newer versions, see im...
$PHP_AUTOCONF errors on mac os x 10.7.3 when trying to install pecl extensions
...memcache and in both cases, I get similar errors. This is on MAC OS X 10.7.3 (lion) and I also have XCODE installed on it. I also installed Zend Server community edition before running these commands and have CFLAGS='-arch i386 -arch x86_64' environment variables set. So please help with what I need...
CSS does the width include the padding?
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309
IE used to use the more-convenient-but-non-standard "border-box" box model. In this model, th...
What is the difference between a .xib file and a .storyboard?
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Francisco Corrales Morales
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answered Dec 8 '11 at 19:33
Sagar HatekarSagar...
How do you create optional arguments in php?
...your definition of the parameters:
function dosomething($var1, $var2, $var3 = 'somevalue'){
// Rest of function here...
}
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Rails 4: before_filter vs. before_action
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523
As we can see in ActionController::Base, before_action is just a new syntax for before_filter.
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How to access object attribute given string corresponding to name of that attribute
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