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Generate random string/characters in JavaScript
...
function generateId (len) {
var arr = new Uint8Array((len || 40) / 2)
window.crypto.getRandomValues(arr)
return Array.from(arr, dec2hex).join('')
}
console.log(generateId())
// "82defcf324571e70b0521d79cce2bf3fffccd69"
console.log(generateId(20))
// "c1a050a4cd1556948d41"
For more in...
How do I test for an empty string in a Bash case statement?
...s.onClickDraftSave('#login-link');
var $window = $(window),
onScroll = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.sc...
iOS - How to set a UISwitch programmatically
...s.onClickDraftSave('#login-link');
var $window = $(window),
onScroll = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.sc...
Bash Script: count unique lines in file
...s.onClickDraftSave('#login-link');
var $window = $(window),
onScroll = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.sc...
Execution time of C program
...architecture; on modern systems you easily get 10ms or lower, but on older Windows machines (from the Win98 era) it was closer to 60ms.
clock() is standard C; it works "everywhere". There are system-specific functions, such as getrusage() on Unix-like systems.
Java's System.currentTimeMillis() doe...
How to undo another user’s checkout in TFS?
...ation here. It can be accessed by launching a Visual Studio Command Prompt window. The syntax of the command is:
tf undo [/workspace:workspacename[;workspaceowner]]
[/server:servername] [/recursive] itemspec [/noprompt]
For one file
tf undo /workspace:workspacename;workspaceowner $/projectname/...
How do negated patterns work in .gitignore?
...s.onClickDraftSave('#login-link');
var $window = $(window),
onScroll = function(e) {
var $elem = $('.new-login-left'),
docViewTop = $window.sc...
getting the X/Y coordinates of a mouse click on an image with jQuery [duplicate]
...
You can use pageX and pageY to get the position of the mouse in the window. You can also use jQuery's offset to get the position of an element.
So, it should be pageX - offset.left for how far from the left of the image and pageY - offset.top for how far from the top of the image.
Here is a...
Cannot ping AWS EC2 instance
...cho Request
D: Select either Anywhere or My IP
E: Select Save
3) Next, Windows firewall blocks inbound Echo requests by default. Allow Echo requests by creating a windows firewall exception...
Go to Start and type Windows Firewall with Advanced Security
Select inbound rules
4) Done! Hopefu...
Pass Variables by Reference in Javascript
...s variable like by reference:
var a = 1;
inc = function(variableName) {
window[variableName] += 1;
};
inc('a');
alert(a); // 2
EDIT
yup, actually you can do it without access global
inc = (function () {
var variableName = 0;
var init = function () {
variableName += 1;
...