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Why are dates calculated from January 1st, 1970?
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It is the standard of Unix time.
Unix time, or POSIX time, is a system for describing points in time, defined as the number of seconds elapsed since midnight proleptic Coordinated Universal Time (UTC) of January 1, 1970, ...
Cartesian product of multiple arrays in JavaScript
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2020 Update: 1-line (!) answer with vanilla JS
Original 2017 Answer: 2-line answer with vanilla JS:
(see updates below)
All of the answers here are overly complicated, most of them take 20 lines of code or even more.
This example uses just two lines of vani...
Iterate through object properties
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Iterating over properties requires this additional hasOwnProperty check:
for (var prop in obj) {
if (Object.prototype.hasOwnProperty.call(obj, prop)) {
// do stuff
}
}
It's necessary because an object's pr...
Use jQuery to hide a DIV when the user clicks outside of it
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Had the same problem, came up with this easy solution. It's even working recursive:
$(document).mouseup(function(e)
{
var container = $("YOUR CONTAINER SELECTOR");
// if the target of the click isn't the container nor a descendant of the contain...
Is it possible to focus on a using JavaScript focus() function?
Is it possible to focus on a <div> using JavaScript focus() function?
8 Answers
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Why does Git say my master branch is “already up to date” even though it is not?
I just deleted ALL the code from a file in my project and committed the change to my local git (on purpose). I did
7 Answe...
Behaviour of increment and decrement operators in Python
...ncrement/decrement operator can be applied on a variable (like ++count ). It compiles, but it does not actually change the value of the variable!
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django - why is the request.POST object immutable?
As the title asks, why did the Django guys decide to implement the request.POST object with a querydict (which, of course, in turn, makes the whole thing immutable?)
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PHP parse/syntax errors; and how to solve them
...nto syntax errors. Even experienced programmers make typos. For newcomers, it's just part of the learning process. However, it's often easy to interpret error messages such as:
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Ruby - test for array
...follow
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edited Mar 30 at 18:35
siery
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answered Oct 6...