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What is the difference between gsub and sub methods for Ruby Strings

... Yeah. I understand now. In my defense, I don't think this was very obvious... Until now, that is. – Ryanmt Jul 20 '11 at 22:50 ...
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Unable to simultaneously satisfy constraints, will attempt to recover by breaking constraint

...o do this: DEBUG VIEW HIERARCHY (Do not recommend this way) Since you know where to find unexpected constraints (PBOUserWorkDayHeaderView) there is a way to do this fairly well. Lets find UIView and NSLayoutConstraint in red rectangles. Since we know their id in memory it is quite easy. Stop a...
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How to split a long regular expression into multiple lines in JavaScript?

... function(reg){ return reg.source; } ).join(''), options); } And now let's rock var r = multilineRegExp([ /^foo/, // we can add comments too /(.*)/, /\bar$/ ]); Since it has a cost, try to build the real regex just once and then use that. ...
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What does @synchronized() do as a singleton method in objective C?

I just created a singleton method, and I would like to know what the function @synchronized() does, as I use it frequently, but do not know the meaning. ...
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Clear back stack using fragments

...he claimed working proposals). If null, only the top state is popped Now, I do realize that I'm lacking knowledge of your particular implementations (like how many entries you have in the back stack at the given point in time), but I would bet all my money on the accepted answer when expecting...
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What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }

...ion outerFunction() { function innerFunction() { // code } } Now you can call outerFunction(), but the visiblity of innerFunction() is limited to the scope of outerFunction(), meaning it is private to outerFunction(). It basically follows the same principle as variables in Javascript: ...
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How to saveHTML of DOMDocument without HTML wrapper?

... All of these answers are now wrong, because as of PHP 5.4 and Libxml 2.6 loadHTML now has a $option parameter which instructs Libxml about how it should parse the content. Therefore, if we load the HTML with these options $html->loadHTML($conte...
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Group by multiple columns in dplyr, using string vector input

...as the expression is wrapped in a call to vars(). – knowah Aug 15 '19 at 14:13 @Khashir yes, this answer still works @...
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Change Bootstrap input focus blue glow

Does anyone know the how to change Bootstrap's input:focus ? The blue glow that shows up when you click on an input field? ...
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Why is TypedReference behind the scenes? It's so fast and safe… almost magical!

...ng of a couple of places in my own code that I'm going to go look at right now, to see if I can optimize them using the techniques you pointed out. – P Daddy Jan 22 '11 at 16:15 1 ...