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在MongoDB中模拟Auto Increment - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...代码大致如下所示：
<?php
function generate_auto_increment_id($namespace, array $option = array())
{
$option += array(
'init' => 1,
'step' => 1,
);
$instance = new Mongo();
$instance = $instance->selectCollection('_seq', 'seq');
$seq = ...
Check if a subview is in a view
...
You are probably looking for UIView's -(BOOL)isDescendantOfView:(UIView *)view; taken in UIView class reference.
Return Value
YES if the receiver is an immediate or distant
subview of view or if view is the receiver itself; otherwise NO.
...
What is jQuery Unobtrusive Validation?
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Can you please tell us the improvements done in mvc3 for Unobtrusive validations ?
– wwcdwdcw
May 30 '13 at 16:57
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Use Font Awesome Icon in Placeholder
... characters with a custom font (you can look at the FontAwesome Cheatsheet for the escaped Unicode character in the content rule. In the less source code it's found in variables.less The challenge would be to swap the fonts when the input is not empty. Combine it with jQuery like this.
<form rol...
How to make a display in a horizontal row
... Ah yes, they'll need to be reversed in the markup (so much for separation of layout/markup!)
– alex
May 25 '09 at 5:19
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How can I select item with class within a DIV?
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how to you check for anything in at div and then put it in :not()
– SuperUberDuper
Mar 26 '15 at 17:17
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How to get multiple select box values using jQuery?
...jQuery that it's inevitably a struggle to find the way that you're looking for.
– Charles Wood
Jun 13 '14 at 14:59
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jQuery: how to get which button was clicked upon form submission?
I have a .submit() event set up for form submission. I also have multiple forms on the page, but just one here for this example. I'd like to know which submit button was clicked without applying a .click() event to each one.
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How can I make a div stick to the top of the screen once it's been scrolled to?
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that doesn't acchieve what I'm going for. I'd like the element to start at 200px below the top of the page (to allow room for other content) and then once the user has scrolled down become fixed at the top.
– evanr
Aug 1 '0...
Likelihood of collision using most significant bits of a UUID in Java
...D.randomUUID() generates a type 4 UUID.
This means that six bits are used for some type information and the remaining 122 bits are assigned randomly.
The six non-random bits are distributed with four in the most significant half of the UUID and two in the least significant half. So the most signif...