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Why do people say that Ruby is slow? [closed]

... always an issue if it impacts usability. True, scanning an xml file for a string in one second or three doesn't matter from a pure numbers point of view, but a couple seconds difference can make a big difference in usability when you're talking about a user-facing application. ...
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Rails respond_with: how does it work?

...tion => posts_path) # Note that if you want to pass a URL with a query string # then the location option would be needed. # /users?scope=active respond_with(@user, :location => users_path(:scope => 'active')) As an alternative, the responders gem not only provides some modules for over...
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When exactly are onSaveInstanceState() and onRestoreInstanceState() called?

... String activityState; @Override public void onCreate(Bundle savedInstanceState) { // call the super class onCreate to complete the creation of activity like // the view hierarchy super.onCreate(savedInstanceState); // rec...
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Is recursion ever faster than looping?

...is expressed using tail calls. Though that is sometimes slightly offset by extra complication in the tail version like extra parameters. – Kaz Jan 14 at 16:09 ...
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Why are margin/padding percentages in CSS always calculated against width?

... I suppose that it would be nice to have an extra element in the syntax so that you could write say padding: n [type]. So you would have padding: 5% logical (what the OP suggests) as opposed to padding: 5% width with the second parameter defaulting to "width" for backw...
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How to slice an array in Bash

... defaults to zero, an omitted second index defaults to the size of the string being sliced. >>> local a=(0 1 2 3 4 5) >>> # from the beginning to position 2 (excluded) >>> echo $(array.slice 0:2 "${a[@]}") >>> echo $(array.slice :2 "${a[@]}...
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Why can't a text column have a default value in MySQL?

...XT column actually takes less total memory than storing the same data in a CHAR or VARCHAR column. – David Cary Sep 28 '12 at 17:35 5 ...
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Why use argparse rather than optparse?

...bs. docopt is an external lib worth looking at, which uses a documentation string as the parser for your input. click is also external lib and uses decorators for defining arguments. (My source recommends: Why Click) python-inquirer For selection focused tools and based on Inquirer.js (repo) If yo...
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phpinfo() - is there an easy way for seeing it?

... My webhost (debian 7): php -r 'phpinfo();' Error in argument 1, char 2: option not found r php -v PHP 4.4.9 (cgi-fcgi) (built: Feb 28 2017 11:31:58) – Prisoner 13 Sep 27 '17 at 8:22 ...
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How to post pictures to instagram using API

...ount that you wish to post a photo too // Set all of the parameters in the string, and then sign it with their API key using SHA-256 $data ='{"device_id":"'.$device_id.'","guid":"'.$guid.'","username":"'.$username.'","password":"'.$password.'","Content-Type":"application/x-www-form-urlencoded; chars...