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What is (functional) reactive programming?
...Keep deconstructing into pieces that are more general/simple.
So that you know you're on solid ground, give the whole model a compositional foundation, using the technique of denotational semantics, which just means that (a) each type has a corresponding simple & precise mathematical type of "me...
Get the Highlighted/Selected text
... and texty <input> elements, you could use the following. Since it's now 2016 I'm omitting the code required for IE <= 8 support but I've posted stuff for that in many places on SO.
function getSelectionText() {
var text = "";
var activeEl = document.activeElement;
var a...
How to stop event bubbling on checkbox click
...om executing
the default action. Use the method
isDefaultPrevented to know whether
this method was ever called (on that
event object).
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Parsing JSON giving “unexpected token o” error [duplicate]
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@mko: In this case, you don't. You know it is or you don't. Look at it and see if it conforms to the JSON specification.
– Dark Falcon
Sep 15 '14 at 12:49
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Remove the legend on a matplotlib figure
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Right. Thanks for the answer. Now I agree that draw is more appropriate (but I've always used show to update my graphs...).
– Olivier Verdier
Apr 20 '11 at 20:31
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How to use if statements in underscore.js templates?
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@BlackDivine I know it's kind of late, but for alternating styles you should use :nth-child(even) and :nth-child(odd) CSS selectors, not change your template.
– prayerslayer
Aug 30 '13 at 8:41
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Convert JSON string to dict using Python
...: return json.load(json_data) I'm sure this can be improved, but now you can call d = read_json(j) on a json 'str' or 'file'.
– Jacques Mathieu
May 31 '18 at 16:32
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Programmatically scroll a UIScrollView
... flick. Basically my code works in a way similar to the iPhone photo app. Now, is there a way that I can programmatically do the same thing so that I end up with a slideshow that runs on its own with a click of a button and a configurable pause between each scroll?
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Detecting arrow key presses in JavaScript
... use event.key. No more arbitrary number codes! If you are transpiling or know your users are all on modern browsers, use this!
node.addEventListener('keydown', function(event) {
const key = event.key; // "ArrowRight", "ArrowLeft", "ArrowUp", or "ArrowDown"
});
Verbose Handling:
switch (event.k...
Assigning default values to shell variables with a single command in bash
... builtin to eat the expansion of the ${..} BUT leaving VARIABLE set. Until now I was doing this: VARIABLE="${VARIABLE:-DEFAULT_VALUE}" and feeling dorky for using VARIABLE twice.
– dino
Oct 6 '15 at 18:06
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