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Double negation (!!) in javascript - what is the purpose? [duplicate]

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Custom global Application class breaks with “android.app.Application cannot be cast to”

... 476 The error states that the type of the object returned by getApplication is android.app.Applica...
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:after and :before pseudo-element selectors in Sass [duplicate]

... 428 Use ampersand to specify the parent selector. SCSS syntax: p { margin: 2em auto; &g...
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How to create user for a db in postgresql? [closed]

I have installed PostgreSQL 8.4 on my CentOS server and connected to root user from shell and accessing the PostgreSQL shell. ...
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NSLayoutConstraint crashes ViewController [duplicate]

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What is the difference between pylab and pyplot? [duplicate]

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How to put labels over geom_bar for each bar in R with ggplot2

... 145 Try this: ggplot(data=dat, aes(x=Types, y=Number, fill=sample)) + geom_bar(position = 'd...
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Cast from VARCHAR to INT - MySQL

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Access properties of the parent with a Handlebars 'each' loop

... 429 There are two valid ways to achieve this. Dereference the parent scope with ../ By prependin...
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What is java pojo class, java bean, normal class? [duplicate]

... 147 Normal Class: A Java class Java Beans: All properties private (use getters/setters) A publ...