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What is the difference between parseInt() and Number()?
...cifically integers that don't fit in a signed 32-bit integer -- because in JavaScript, bitwise operators treat their operands as a sequence of 32 bits, rather than as decimal, hexadecimal, or octal numbers. Hence (2**31).toString() >> 0 will overflow to -2147483648. You can use >>> in...
How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
...
I would also like to point out that you can use a javascript approach, window.history.replaceState to prevent a resubmit on refresh and back button.
<script>
if ( window.history.replaceState ) {
window.history.replaceState( null, null, window.location.href...
How to enter a multi-line command
... will also work in some contexts:
1,
2
Keep in mind, though, similar to JavaScript's Automatic Semicolon Insertion, there are some things that are similarly broken because the line break occurs at a point where it is preceded by a valid statement:
return
5
will not work.
Finally, strings (i...
Unicode character in PHP string
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JSON is not JavaScript.
– Gumbo
May 19 '11 at 12:43
4
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How to overcome “datetime.datetime not JSON serializable”?
...ording to ISO 8601 format, YYYY-MM-DDTHH:MM:SS (which is easily decoded by JavaScript). If more complex serialized representations are sought, other code could be used instead of str() (see other answers to this question for examples). The code ends by raising an exception, to deal with the case it ...
What is a monad?
...that is, functions which can take other functions as arguments).
Arrays in JavaScript support the pattern, so let’s use that as the first example.
The gist of the pattern is we have a type (Array in this case) which has a method which takes a function as argument. The operation supplied must retur...
What is the difference between visibility:hidden and display:none?
...; does not. visibility: hidden has the additional benefit of not capturing javascript events, whereas opacity: 0; captures events.
– Michael Deal
Jul 21 '15 at 8:09
10
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Can I hide the HTML5 number input’s spin box?
...s Chrome) render for HTML input of type number? I am looking for a CSS or JavaScript method to prevent the up/down arrows from appearing.
...
Unix command-line JSON parser? [closed]
...g JSON data - can be used as a simple pretty-printer, or as a full-powered Javascript command-line
POWERFUL - Exposes the full power and functionality of underscore.js (plus underscore.string)
SIMPLE - Makes it simple to write JS one-liners similar to using "perl -pe"
CHAINED - Multiple command invo...
Is there an opposite to display:none?
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When changing element's display in Javascript, in many cases a suitable option to 'undo' the result of element.style.display = "none" is element.style.display = "". This removes the display declaration from the style attribute, reverting the actual value of di...