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How to disable / enable dialog negative positive buttons?

Please look at the custom dialog below. I have an edittext field on the dialog and if the text field is empty I would like to disable the positiveButton . I can get a charListener for the text field but I am not sure how I am going to set the positivebutton to disable or enable from that listene...
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How to use “raise” keyword in Python [duplicate]

I have read the official definition of "raise", but I still don't quite understand what it does. 6 Answers ...
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How do I get the information from a meta tag with JavaScript?

...follow | edited Oct 20 '18 at 0:55 neiker 8,38933 gold badges2525 silver badges3131 bronze badges ...
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Why can't I forward-declare a class in a namespace using double colons?

...ied names are only used to refer to existing (i.e. previously declared) entities. They can't be used to introduce new entities. And you are in fact "reopening" the namespace to declare new entities. If the class Class is later defined as a member of different namespace - it is a completely differen...
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Convert string with commas to array

...g + "]"); This gives you an Array of numbers. [0, 1] If you use .split(), you'll end up with an Array of strings. ["0", "1"] Just be aware that JSON.parse will limit you to the supported data types. If you need values like undefined or functions, you'd need to use eval(), or a JavaScript...
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What does “:=” do?

I've seen := used in several code samples, but never with an accompanying explanation. It's not exactly possible to google its use without knowing the proper name for it. ...
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Regular expression for first and last name

For website validation purposes, I need first name and last name validation. 23 Answers ...
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How to access route, post, get etc. parameters in Zend Framework 2

...est way to do that would be to use the Params plugin, introduced in beta5. It has utility methods to make it easy to access different types of parameters. As always, reading the tests can prove valuable to understand how something is supposed to be used. Get a single value To get the value of a name...
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DateTime.ToString() format that can be used in a filename or extension?

... are created but most of the DateTime methods I've tried output something with spaces and slashes. For instance: 8 Answers ...
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Split string on the first white space occurrence

I didn't get an optimized regex that split me a String basing into the first white space occurrence: 13 Answers ...