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Correct way to write loops for promise.
...e call and the chained logger.log(res) runs synchronously through iteration? (bluebird)
13 Answers
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How to make an AJAX call without jQuery?
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With "vanilla" JavaScript:
<script type="text/javascript">
function loadXMLDoc() {
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function() {
if (xmlhttp.readyState == XMLHttpRequest.DONE) { // XMLHttpRequest.DONE == 4
if (xmlhttp.status ==...
A generic error occurred in GDI+, JPEG Image to MemoryStream
...uch so that I have been unable to find an answer to my problem as my scenario doesn't fit. An exception gets thrown when I save the image to the stream.
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Fastest way to check a string contain another substring in JavaScript?
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You have two possibilites:
Regular expression:
(new RegExp('word')).test(str)
// or
/word/.test(str)
indexOf:
str.indexOf('word') !== -1
Regular expressions seem to be faster (at least in Chrome 10).
Performance test - short haystack
Performance test - long ha...
Incrementing a date in JavaScript
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Three options for you:
1. Using just JavaScript's Date object (no libraries):
My previous answer for #1 was wrong (it added 24 hours, failing to account for transitions to and from daylight saving time; Clever Human pointed out that...
TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi
I am getting TransactionManagementError when trying to save a Django User model instance and in its post_save signal, I'm saving some models that have the user as the foreign key.
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Get all unique values in a JavaScript array (remove duplicates)
...an Array in the following way to get an array with unique values:
function onlyUnique(value, index, self) {
return self.indexOf(value) === index;
}
// usage example:
var a = ['a', 1, 'a', 2, '1'];
var unique = a.filter(onlyUnique);
console.log(unique); // ['a', 1, 2, '1']
The native me...
How to check if a file is a valid image file?
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A lot of times the first couple chars will be a magic number for various file formats. You could check for this in addition to your exception checking above.
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How do I check CPU and Memory Usage in Java?
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Just curious, why should these only be an estimate?
– ComputerScientist
May 24 '15 at 23:12
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NSDictionary - Need to check whether dictionary contains key-value pair or not
I just need to ask something as follow.
Suppose I am having a dictionary.
2 Answers
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