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com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
...B server has run out of connections.
Something in between Java and DB is blocking connections, e.g. a firewall or proxy.
To solve the one or the other, follow the following advices:
Verify and test them with ping.
Refresh DNS or use IP address in JDBC URL instead.
Verify it ...
SensorUtil 传感器工具扩展：在后台和屏幕关闭时保持传感器工作 · App Inv...
...g:hover { color: #3773f5 } .feedback-pop .feedback-img { display: inline-block; width: 24px; height: 24px; margin-bottom: 4px; background: url(/static/images/feedback.svg) 50% / 100% auto no-repeat; } 文档反馈 切换 目录 在线 客服 ...
Validate that end date is greater than start date with jQuery
...e textbox.
Add an endDate class to your end date textbox.
Add this script block to your page:-
<script type="text/javascript">
$(document).ready(function() {
$.validator.addMethod("endDate", function(value, element) {
var startDate = $('.startDate').val();
...
Amazon SimpleDB vs Amazon DynamoDB
...n the table at any time. Upto 5 are supported.
So, indexing is no longer a blocking issue for many use cases.
You should also know that SimpleDB has size and performance limits. (10GB and say, 25 requests/sec)
Perhaps eventually, DynamoDB will replace SimpleDB in all but the most simple use cases....
fancybox2 / fancybox causes page to to jump to the top
...
I guess that would block the mouse-wheel functionality - I will continue to look for other solutions as well. But like I said, this is doing the trick for now!
– sheriffderek
Nov 25 '12 at 6:46
...
Iterating each character in a string using Python
...s a list, so for a very long length you may end up allocating a very large block of memory. At the very least use xrange() in those cases. Also, repeated indexing of the same string is much slower than iterating directly over the string. If you need the index, use enumerate().
–...
Disable Visual Studio code formatting in Razor
...eems not to trigger auto-formatting. But pasting reformats the entire code block.
This is terrible beyond words. It makes Visual Studio IDE virtually unusable for Razor editing. One has to use an external editor for Razor files.
What's even worse, even the latest Visual Studio 2013 Update 1 crashe...
Max retries exceeded with URL in requests
...ress() is a user define function which can change the IP address if it get blocked. You can go without this function.
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Filtering collections in C#
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Here is a code block / example of some list filtering using three different methods that I put together to show Lambdas and LINQ based list filtering.
#region List Filtering
static void Main(string[] args)
{
ListFiltering();
Conso...
Kotlin Ternary Conditional Operator
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There is no ternary operator in kotlin, as the if else block returns value
so, you can do:
val max = if (a > b) a else b
instead of java's max = (a > b) ? b : c
We can also use when construction, it also return value:
val max = when(a > b) {
true -> a
false...