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HTML5 Pre-resize images before uploading
...reateElement("img");
var reader = new FileReader();
reader.onload = function(e) {img.src = e.target.result}
reader.readAsDataURL(file);
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var MAX_WIDTH = 800;
var MAX_HEIGHT = 600;
var width = img.width;
var height = img.height;
if (wid...
How can I reset a react component including all transitively reachable state?
I occasionally have react components that are conceptually stateful which I want to reset. The ideal behavior would be equivalent to removing the old component and readding a new, pristine component.
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What is the difference between children and childNodes in JavaScript?
...lly you don't want to loop over Text or Comment nodes in your DOM manipulation.
If you do want to manipulate Text nodes, you probably want .textContent instead. 4
1. Technically, it is an attribute of ParentNode, a mixin included by Element.
2. They are all elements because .children is a HTMLCo...
Show pop-ups the most elegant way
...m/bootstrap/) has an excellent $modal service (used to be called $dialog prior to version 0.6.0) that is an implementation of a service to display partial's content as a modal popup.
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Closing WebSocket correctly (HTML5, Javascript)
...g around with HTML5 WebSockets. I was wondering, how do I close the connection gracefully? Like, what happens if user refreshes the page, or just closes the browser?
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node and Error: EMFILE, too many open files
For some days I have searched for a working solution to an error
17 Answers
17
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Where does the “flatmap that s***” idiomatic expression in Scala come from?
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The reasoning behind this phrase is that you can replace a lot of tedious if/then/else code you would write with calls to flatMap (and other higher order functions).
This is especially true for Options (see http://tonymorris.github.io/blog/posts/scalaoption-cheat-sheet/)
But it applies to o...
Reading file contents on the client-side in javascript in various browsers
I'm attempting to provide a script-only solution for reading the contents of a file on a client machine through a browser.
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How is the default submit button on an HTML form determined?
...s considered active; this doesn't really fall under the remit of your question since here the submit button is unambiguous but I thought I'd include it for people who read the first part and wonder how to make a submit button successful via JS form submission. Of course, the form's onsubmit handler...
What are Runtime.getRuntime().totalMemory() and freeMemory()?
...t of memory required to hold an object of any given type may be implementation-dependent.
maxMemory()
Returns the maximum amount of memory that the Java virtual machine will attempt to use. If there is no inherent limit then the value Long.MAX_VALUE will be returned.
freeMemory()
Returns the a...