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What is the difference between 0.0.0.0, 127.0.0.1 and localhost?

I am using Jekyll and Vagrant on my mac. I found that Jekyll server will bind to 0.0.0.0:4000 instead of 127.0.0.1:4000 . Also gem server will bind to this address by default. I can still visit it via http://localhost:port . But for Jekyll , it seems that the default setting (e.g. 0.0....
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Travel/Hotel API's? [closed]

...tions, Policies, Coordinates, Facilities, Reviews, Local area descriptions and their amenities etc. 7 Answers ...
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Obtain form input fields using jQuery?

... In newer versions of jQuery, Simon_Weaver's answer is more robust and easier. – MightyE May 3 '10 at 21:27 1 ...
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Creating a left-arrow button (like UINavigationBar's “back” style) on a UIToolbar

... that I derived from http://www.teehanlax.com/blog/?p=447 http://www.chrisandtennille.com/pictures/backbutton.psd I then just created a custom UIView that I use in the customView property of the toolbar item. Works well for me. Edit: As pointed out by PrairieHippo, maralbjo found that using th...
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What is the best way to trigger onchange event in react js

... For React 16 and React >=15.6 Setter .value= is not working as we wanted because React library overrides input value setter but we can call the function directly on the input as context. var nativeInputValueSetter = Object.getOwnProp...
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Laravel Eloquent groupBy() AND also return count of each group

... table that contains, amongst other columns, a column of browser versions. And I simply want to know from the record-set, how many of each type of browser there are. So, I need to end up with something like this: Total Records: 10; Internet Explorer 8: 2; Chrome 25: 4; Firefox 20: 4. (All adding up ...
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Adding a new value to an existing ENUM Type

... NOTE if you're using PostgreSQL 9.1 or later, and you are ok with making changes outside of a transaction, see this answer for a simpler approach. I had the same problem few days ago and found this post. So my answer can be helpful for someone who is looking for solut...
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How to JSON serialize sets?

I have a Python set that contains objects with __hash__ and __eq__ methods in order to make certain no duplicates are included in the collection. ...
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“Variable” variables in Javascript?

...les that do not become a property of window are variables defined with let and const, and classes. There is almost always a better solution than using variable variables! Instead you should be looking at data structures and choose the right one for your problem. If you have a fixed set of names, s...
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How do I create an HTML table with a fixed/frozen left column and a scrollable body?

... columns scroll horizontally, you can position: absolute the first column (and specify its width explicitly), and then wrap the entire table in an overflow-x: scroll block. Don't bother trying this in IE7, however... Relevant HTML & CSS: table { border-collapse: separate; border-sp...