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Merging objects (associative arrays)
...ver. As it is, this could will copy all properties including those derived from Object.prototype
– bucabay
Sep 20 '09 at 18:54
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In Java, what does NaN mean?
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Taken from this page:
"NaN" stands for "not a number". "Nan"
is produced if a floating point
operation has some input parameters
that cause the operation to produce
some undefined result. For example,
0.0 divided by 0...
How can I round a number in JavaScript? .toFixed() returns a string?
...ed is a function designed to format a number before printing it out. It's from the family of toString, toExponential and toPrecision.
To round a number, you would do this:
someNumber = 42.008;
someNumber = Math.round( someNumber * 1e2 ) / 1e2;
someNumber === 42.01;
// if you need 3 digits, repla...
When is layoutSubviews called?
... of its direct subviews changed.
A subview is added to the view or removed from the view.
Some relevant details:
The bounds are considered changed only if the new value is different, including a different origin. Note specifically that is why layoutSubviews: is called whenever a UIScrollView scr...
jquery .html() vs .append()
...t;li>'s into a <ul> and saw an increase in render (not load) time from ~12s -> .25s by switching the .append(giantListHTMLAsASingleString) to .html(giantListHTMLAsASingleString). If you are alreadying doing the 'join' trick or building up a big html string on your list there is definite...
Reactive Extensions bug on Windows Phone
... The debugger is guessing correct, and the compiler is somehow taking ques from it. It doesnt really matter why the debugger fixes the problem, the root cause has been found.
– Japes
Jun 18 '15 at 3:54
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Keyboard shortcuts in WPF
...hould take a look on Commands and Input gestures. Here is a small tutorial from Switch on the Code: WPF Tutorial - Command Bindings and Custom Commands
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How to get GET (query string) variables in Express.js on Node.js?
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I learned from the other answers and decided to use this code throughout my site:
var query = require('url').parse(req.url,true).query;
Then you can just call
var id = query.id;
var option = query.option;
where the URL for get s...
How to justify a single flexbox item (override justify-content)
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"In flexbox layouts, this property is ignored" -taken from the mozilla docs on justify-self
– Finlay Percy
Aug 7 '18 at 16:11
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What's the point of 'const' in the Haskell Prelude?
...th (&&&), const, (.), fst, snd. Note that (&&&) is from Control.Arrow.
The solution of the example using these functions is:
(fst.fst &&& (fst.snd &&& (const 5 &&& fst.fst)))
Note the similarity with (a,(c,(5,a))). What if we replace &a...