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Get file size, image width and height before upload
...;
const readImage = file => {
if ( !(/^image\/(png|jpe?g|gif)$/).test(file.type) )
return EL_preview.insertAdjacentHTML('beforeend', `Unsupported format ${file.type}: ${file.name}<br>`);
const img = new Image();
img.addEventListener('load', () => {
EL_preview.app...
Android webview & localStorage
...with a webview which may access to the localStorage by an HTML5 app. The test.html file informs me that local
storage is'nt supported by my browser (ie. the webview ). If you have any suggestion..
...
Benefit of using Parcelable instead of serializing object
...lippe Breault made a nice article about this, and also added a performance test. developerphil.com/parcelable-vs-serializable
– WonderCsabo
Jul 5 '13 at 16:35
...
Fast way to get image dimensions (not filesize)
...
I have done some tests with the ImageMagick identify command, using strace to record open/read/mmap/close calls to see how much data was been read from the identified image. It does depend on the file type and file size slightly, but I was ge...
How to set host_key_checking=false in ansible inventory file?
...re by isolating this insecure setting to the hosts required for this (e.g. test systems, local development machines).
What you can do at the inventory level is add
ansible_ssh_common_args='-o StrictHostKeyChecking=no'
or
ansible_ssh_extra_args='-o StrictHostKeyChecking=no'
to your host defini...
Swift - How to convert String to Double
...ng, and returns nil when the string does not contain a Double value (e.g. "test" will not return 0.0).
let double = NSNumberFormatter().numberFromString(myString)?.doubleValue
Alternatively, extending Swift's String type:
extension String {
func toDouble() -> Double? {
return Numb...
Is there a cross-browser onload event when clicking the back button?
...Query adds an onunload event listener.
// http://code.jquery.com/jquery-latest.js
jQuery(window).bind("unload", function() { // ...
By default, it does nothing. But somehow this seems to trigger a reload in Safari, Opera and Mozilla -- no matter what the event handler contains.
[edit(Nickolay): ...
Allow user to set up an SSH tunnel, but nothing else
...rom there you can escape to an unrestricted shell with !/bin/bash. See pen-testing.sans.org/blog/2012/06/06/… for other examples. So allowing individual commands should be done very, very carefully, if at all.
– Fritz
Sep 1 '15 at 17:33
...
Regular Expression to match only alphabetic characters
...('/^[A-Z]+$/i', "abcAbc^Xyz", $m);
var_dump($m);
Output:
array(0) {
}
Test case is for OP's comment that he wants to match only if there are 1 or more alphabets present in the input. As you can see in the test case that matches failed because there was ^ in the input string abcAbc^Xyz.
Note: ...
Invoking JavaScript code in an iframe from the parent page
...ead of document.getElementById.
// this option does not work in most of latest versions of chrome and Firefox
window.frames[0].frameElement.contentWindow.targetFunction();
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