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Idiomatic way to wait for multiple callbacks in Node.js
...omises in parallel
var a = Promise.resolve(1);
var b = Promise.resolve(2);
var c = Promise.resolve(3);
var res = yield [a, b, c];
console.log(res);
// => [1, 2, 3]
}).catch(onerror);
// errors can be try/catched
co(function *(){
try {
yield Promise.reject(new Error('boom'));
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What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
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edited Aug 29 '15 at 16:09
Mifeet
10.4k33 gold badges4646 silver badges8989 bronze badges
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How do different retention policies affect my annotations?
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214
RetentionPolicy.SOURCE: Discard during
the compile. These annotations don't
make any...
Create module variables in Ruby
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edited Jul 26 '19 at 17:08
answered Apr 16 '11 at 23:52
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How do I get an apk file from an Android device?
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24 Answers
24
Active
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Java, How do I get current index/key in “for each” loop [duplicate]
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answered Aug 7 '10 at 18:24
Michael MrozekMichael Mrozek
141k2424 gold badges151151 silver badges159159 bronze badges
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How do I sort an array of hashes by a value in the hash?
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216
Ruby's sort doesn't sort in-place. (Do you have a Python background, perhaps?)
Ruby has sort! ...
Is it possible to set a number to NaN or infinity?
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279
Cast from string using float():
>>> float('NaN')
nan
>>> float('Inf')
inf
&...