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django admin - add custom form fields that are not part of the model

... Thanks for the answer, but this is not what I'm looking for. I do not want the custom fields to be saved in the DB, only the calculated string. Basically what I'm doing is building a mathematical or string expression from symbols, the user chooses symbols (these a...
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How can I scan barcodes on iOS?

... Sean what kind of licence does it use. I want to create a payed app that uses Zbar. Is that possible under the licence agreement ? – Radu Apr 21 '11 at 13:36 ...
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How do I turn off PHP Notices?

... Strange,the local value is On,but the master value is off,don't know what that means exactly... – user198729 May 20 '10 at 11:40 1 ...
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Why is the time complexity of both DFS and BFS O( V + E )

... But every vertex must be extracted from queue, and this is log(|Q|) What about this part? – Yola Jan 24 '16 at 10:56 3 ...
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package R does not exist

... This is what I needed to do when converting an Eclipse test project to an Android Studio module. – RightHandedMonkey Aug 31 '15 at 14:11 ...
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How do I set bold and italic on UILabel of iPhone/iPad?

...hts in your screenshot? Everything brings up boldSystemFontSize(of:__) but what if someone wants light or ultra-light? – Dave G Feb 19 '18 at 2:42 add a comment ...
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Creating an instance using the class name and calling constructor

...ing the namespace. For nested classes, you need to use a dollar (as that's what the compiler uses). For example: package foo; public class Outer { public static class Nested {} } To obtain the Class object for that, you'd need Class.forName("foo.Outer$Nested"). ...
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Center content in responsive bootstrap navbar

... I think this is what you are looking for. You need to remove the float: left from the inner nav to center it and make it a inline-block. .navbar .navbar-nav { display: inline-block; float: none; vertical-align: top; } .navbar .navbar...
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The property 'value' does not exist on value of type 'HTMLElement'

... This fix breaks my code entirely; says whatever comes next "is not a function". I don't understand the reasoning behind the way TS handles this; since getElementById can return any element type, any should be accepted by default. – Turtles A...
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No mapping found for field in order to sort on in ElasticSearch

...ignore_unmapped" : true and it started to work again but strange thing is, what has happened behind the scene! Who knows! Anyway, it works now. +1 – BentCoder May 19 '16 at 20:56 1...