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Is there any kind of hash code function in JavaScript?
Basically, I'm trying to create an object of unique objects, a set. I had the brilliant idea of just using a JavaScript object with objects for the property names. Such as,
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JavaScript isset() equivalent
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I generally use the typeof operator:
if (typeof obj.foo !== 'undefined') {
// your code here
}
It will return "undefined" either if the property doesn't exist or its value is undefined.
(See also: Difference between undefi...
Uses for Optional
...tween wanting to use it everywhere something may be null , and nowhere at all.
14 Answers
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How can I upload fresh code at github?
I have a directory with all my coding projects.
7 Answers
7
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String to object in JS
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Actually, the best solution is using JSON:
Documentation
JSON.parse(text[, reviver]);
Examples:
1)
var myobj = JSON.parse('{ "hello":"world" }');
alert(myobj.hello); // 'world'
2)
var myobj = JSON.parse(JSON.stringify({
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What exactly is Arel in Rails 3.0?
...alid SQL query, but one that doesn't make sense, or that does something totally different from what you think it does. This can never happen with ARel. (This is what the article I link to below means with "closed under composition".)
will objects/queries be "easier" to create?
Yes. For example, as...
CSS overflow-x: visible; and overflow-y: hidden; causing scrollbar issue
... edited Aug 14 '17 at 18:00
callum
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answered Jun 22 '11 at 0:13
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count (non-blank) lines-of-code in bash
... Just habit. I read pipelines from left to right, which means I usually start with cat, then action, action, action, etc. Clearly, the end result is the same.
– Michael Cramer
Sep 24 '08 at 14:06
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Set icon for Android application
...e Assets → select launcher icon → choose image file.
It will automatically re-size.
Done!
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Finding the max/min value in an array of primitives using Java
... loop because the summaryStatistics method is a reduction operation and it allows parallelization.
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