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In javascript, is an empty string always false as a boolean?
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Yes. Javascript is a dialect of ECMAScript, and ECMAScript language specification clearly defines this behavior:
ToBoolean
The result is false if the argument is the empty String (its length is zero);
otherwise the result is true
Quote taken from http://www.ecma-inte...
What is the meaning of erb?
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erb stands for "Embedded RuBy". A .html.erb or .erb.html file is HTML with Ruby code embedded in; Rails will evaluate the Ruby to add content to the file dynamically, and will output a "pure" HTML file for rendering.
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How does std::move() transfer values into RValues?
I just found myself not fully understanding the logic of std::move() .
2 Answers
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React.js: Wrapping one component into another
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</div>
);
}
});
See Multiple Components: Children and Type of the Children props in the docs for more info.
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Create unique constraint with null columns
...(user_id, menu_id, recipe_id), you cannot base CLUSTER on a partial index, and queries without a matching WHERE condition cannot use the partial index. (It seems unlikely you'd want a FK reference three columns wide - use the PK column instead).
If you need a complete index, you can alternatively d...
Xcode Debugger: view value of variable
... answered Jan 19 '11 at 15:15
AndriyAndriy
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How to reset a form using jQuery with .reset() method
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Simply magical and straight forward! Much appreciated for sharing.
– Ajay Kumar
Dec 10 '18 at 19:38
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Firebug says “No Javascript on this page”, even though JavaScript does exist on the page
...functionality but Firebug per se is never going to be fixed for Firefox 50 and beyond
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How to merge specific files from Git branches
I have 2 git branches branch1 and branch2 and I want to merge file.py in branch2 into file.py in branch1 and only that file.
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Xcode: issue “file xxx.png is missing from working copy” at project building
...answered Aug 19 '16 at 8:47
Alexander VaseninAlexander Vasenin
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