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How to check if a folder exists
...t this throws an exception when the folder does not exist, how can I check if the folder exists with the new IO?
10 Answer...
How to duplicate a whole line in Vim?
...t. For some reason though, I find hitting y twice is faster for me than SHIFT-y
– Mark Biek
Oct 6 '08 at 12:35
26
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How to document thrown exceptions in c#/.net
... thrown by your code, including those in any methods that you might call.
If the list gets a bit big, you might want to create your own exception type. Catch all the ones you might encounter within your method, wrap them in your exception, and throw that.
Another place you might want to do it thi...
ActiveRecord.find(array_of_ids), preserving order
... (ActiveSupport) patches the Hash class to make it behave the same way, so if you're using Rails, you should be ok.
– Gunchars
Sep 3 '13 at 21:39
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How to get innerHTML of DOMNode?
...
A simplified version of Haim Evgi's answer:
<?php
function innerHTML(\DOMElement $element)
{
$doc = $element->ownerDocument;
$html = '';
foreach ($element->childNodes as $node) {
$html .= $doc->sa...
SQL WHERE ID IN (id1, id2, …, idn)
...dditionally the SQL engine doesn't immediately know that you want to check if the value is one of the values in a fixed list. However, a good SQL engine could optimize it to have equal performance like with IN. There's still the readability issue though...
Option 3 is simply horrible performance-wis...
C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...lement xe=(XmlElement)xn;//将子节点类型转换为XmlElement类型
if(xe.GetAttribute("genre")=="张三")//如果genre属性值为“张三”
{
xe.SetAttribute("genre","update张三");//则修改该属性为“update张三”
XmlNodeList nls=xe.ChildNodes;//继续获取xe...
How to send email attachments?
...
Here is the modified version from Oli for python 3
import smtplib
from pathlib import Path
from email.mime.multipart import MIMEMultipart
from email.mime.base import MIMEBase
from email.mime.text import MIMEText
from email.utils import COM...
jQuery slideUp().remove() doesn't seem to show the slideUp animation before remove occurs
...
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
...
CSS filter: make color image with transparency white
...
}
<p>
Original:
<img src="http://i.stack.imgur.com/jO8jP.gif" />
</p>
<p>
Filter:
<img src="http://i.stack.imgur.com/jO8jP.gif" class="filter" />
</p>
First, brightness(0) makes all image black, except transparent parts, which remain transp...