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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?

... Hash keys are "simple" symbols (more or less something that matches /\A[a-z_]\w*\z/i, AFAIK the parser uses its label pattern for these keys). The :$in style symbols show up a fair bit when using MongoDB so you'll end up mixing Hash styles if you use MongoDB. And, if you ever work with specific ke...
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iOS: Access app-info.plist variables in code

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Responsive website zoomed out to full width on mobile

...ut Bootstrap responsiveness navbar and I have a demo website. When I resize the browser on a desktop, it all works fine including the nav bar which become collapsible menu with a small icon on the top which I can click to see more menu buttons. ...
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Handler is abstract ,cannot be instantiated

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jQuery form serialize - empty string

...div> </form> will give you in the alert box foo=2. .serialize() takes the name and the value of the form fields and creates a string like name1=value1&name2=value2. Without a name it cannot create such a string. Note that name is something different than id. Your form also would...
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How to change column datatype from character to numeric in PostgreSQL 8.4

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Detect if homebrew package is installed

... edited Feb 3 '17 at 16:33 razzed 2,5472424 silver badges2626 bronze badges answered Dec 27 '13 at 14:31 Ho...
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pandas: multiple conditions while indexing data frame - unexpected behavior

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How to pass the -D System properties while testing on Eclipse?

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How to get the max of two values in MySQL?

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