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How to create a JavaScript callback for knowing when an image is loaded?
...
.complete + callback
This is a standards compliant method without extra dependencies, and waits no longer than necessary:
var img = document.querySelector('img')
function loaded() {
alert('loaded')
}
if (img.complete) {
loaded()
} else {
img.addEventListener('load', loaded)
img.a...
Null check in an enhanced for loop
... Note that Collections.emptyList() will avoid allocating an extra object (IIRC).
– Jon Skeet
Feb 12 '10 at 6:31
7
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Camera access through browser
...ctures from an HTML5 page and upload them to your server. It requires some extra programming on the server, but apart from PhoneGap, I have not found another way.
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node.js fs.readdir recursive directory search
... ) the stderr and stdout are Buffers.. so wouldn't you need to do stdout.toString.split("\n") since Buffers are not Strings?
– Cheruvim
Nov 18 '14 at 22:20
8
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Multiline bash commands in makefile
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If you want to break a string in bash/perl/script inside makefile, close the string quote, backslash, newline, (no indentation) open string quote. Example; perl -e QUOTE print 1; QUOTE BACKSLASH NEWLINE QUOTE print 2 QUOTE
–...
Is #pragma once a safe include guard?
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To use include guards, there is the extra requirement that you must define a new symbol such as #ifndef FOO_BAR_H, normally for a file such as "foo_bar.h". If you later rename this file, should you adjust the include guards accordingly to be consistent with thi...
How do I get an ISO 8601 date on iOS?
It's easy enough to get the ISO 8601 date string (for example, 2004-02-12T15:19:21+00:00 ) in PHP via date('c') , but how does one get it in Objective-C (iPhone)? Is there a similarly short way to do it?
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windows C++ gbk转为utf-8 - C/C++ - 清泛网 - 专注C/C++及内核技术
...码转换为linux使用的utf8格式的，否则会出现乱码。
//m_string是windows下的中文字符串
//utf8_string是返回转换为utf8编码的中文字符串
//slen是utf8_string字符数组的大小
int multichar_2_utf8(const char *m_string,char *utf8_string,int slen) {
int le...
How to use a variable inside a regular expression?
...
From python 3.6 on you can also use Literal String Interpolation, "f-strings". In your particular case the solution would be:
if re.search(rf"\b(?=\w){TEXTO}\b(?!\w)", subject, re.IGNORECASE):
...do something
EDIT:
Since there have been some questions in the co...
Solving a “communications link failure” with JDBC and MySQL [duplicate]
... connecting to the server. Maybe the problem is because of the wrong query string or too many connections to the database.
So I suggest you to try all the solutions one by one and don't give up!
Here are the solutions that I found on the internet and for each of them, there is at least on person w...