大约有 40,000 项符合查询结果（耗时：0.0534秒） [XML]
How to escape the % (percent) sign in C's printf?
...MikeageMikeage
5,99444 gold badges3131 silver badges5151 bronze badges
...
Remove all child elements of a DOM node in JavaScript
...utton>
Bonus: Element.clearChildren monkey-patch:
We can add a new method-property to the Element prototype in JavaScript to simplify invoking it to just el.clearChildren() (where el is any HTML element object).
(Strictly speaking this is a monkey-patch, not a polyfill, as this is not a ...
Parse email content from quoted reply
...llowing manner: if expression did not matched, I try to use the next one.
new Regex("From:\\s*" + Regex.Escape(_mail), RegexOptions.IgnoreCase);
new Regex("<" + Regex.Escape(_mail) + ">", RegexOptions.IgnoreCase);
new Regex(Regex.Escape(_mail) + "\\s+wrote:", RegexOptions.IgnoreCase);
new Reg...
Android buildscript repositories: jcenter VS mavencentral
...central.
In the words of Tor Norbye:
I ran AndroidStudio with a brand new settings directory, so it went and connected maven central and downloaded an index of the available artifacts.
Then I happened to look at the size of my directory.
My ~/Library/Cache/AndroidStudioPreview is 1.5G...
Using an image caption in Markdown Jekyll
...it to GitHub directly without generating the site first), you can create a new file named image.html in _includes:
<figure class="image">
<img src="{{ include.url }}" alt="{{ include.description }}">
<figcaption>{{ include.description }}</figcaption>
</figure>
An...
Using PHP with Socket.io
... through php)
php server
use ElephantIO\Client as Elephant;
$elephant = new Elephant('http://localhost:8000', 'socket.io', 1, false, true, true);
$elephant->init();
$elephant->send(
ElephantIOClient::TYPE_EVENT,
null,
null,
json_encode(array('name' => 'foo', 'args' =>...
ES6 class variable alternatives
...ike you suggested. Also see the summary of the consensus.
ES7 and beyond
A new proposal for ES7 is being worked on that allows more concise instance variables through class declarations and expressions - https://esdiscuss.org/topic/es7-property-initializers
...
Effects of changing Django's SECRET_KEY
...e).
password reset token already sent won't work, users will have to ask a new one.
comments form (if using django.contrib.comments) will not validate if it was requested before the value change and submitted after the value change. I think this is very minor but might be confusing for the user.
mes...
Calculate difference between two datetimes in MySQL
...
my two cents about logic:
syntax is "old date" - :"new date", so:
SELECT TIMESTAMPDIFF(SECOND, '2018-11-15 15:00:00', '2018-11-15 15:00:30')
gives 30,
SELECT TIMESTAMPDIFF(SECOND, '2018-11-15 15:00:55', '2018-11-15 15:00:15')
gives:
-40
...
Finding the number of days between two dates
...is by far the most accurate way of calculating the difference:
$earlier = new DateTime("2010-07-06");
$later = new DateTime("2010-07-09");
$diff = $later->diff($earlier)->format("%a");
share
|
...