大约有 22,590 项符合查询结果（耗时：0.0212秒） [XML]
Eloquent Collection: Counting and Detect Empty
......)->first();
if ($result) { ... }
Notes / References
->first() http://laravel.com/api/4.2/Illuminate/Database/Eloquent/Collection.html#method_first
isEmpty() http://laravel.com/api/4.2/Illuminate/Database/Eloquent/Collection.html#method_isEmpty
->count() http://laravel.com/api/4.2/Ill...
Is there a cross-browser onload event when clicking the back button?
...y".
How does this work? Well, JQuery adds an onunload event listener.
// http://code.jquery.com/jquery-latest.js
jQuery(window).bind("unload", function() { // ...
By default, it does nothing. But somehow this seems to trigger a reload in Safari, Opera and Mozilla -- no matter what the event hand...
How can I create a “Please Wait, Loading…” animation using jQuery?
...ods.
The Setup
Let's start by getting us a nice "loading" animation from http://ajaxload.info
I'll be using
Let's create an element that we can show/hide anytime we're making an ajax request:
<div class="modal"><!-- Place at bottom of page --></div>
The CSS
Next let's giv...
普通码农和CTO之间的差距，就是这7点了 - 杂谈 - 清泛网 - 专注C/C++及内核技术
...听首先要自己把它的每个知识点搞清楚。比如我们可能对HTTP协议并不陌生，但是真的要讲给别人听怎么讲？HTTP协议和TCP协议什么关系？HTTP协议有那些支持的方法？什么是无状态？为什么设计成无状态？Session和Cookie是什么关系...
Invoking JavaScript code in an iframe from the parent page
...ain i.e. abc.com, and both are using same protocol i.e. both are either on http:// or https://.
The call will fail in below mentioned cases:
Parent page and the iframe page are from different domain.
They are using different protocols, one is on http:// and other is on https://.
Any workaround...
Android custom dropdown/popup menu
...ne button.
Filename: activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activit...
Checking if object is empty, works with ng-show but not from controller?
... // items have value
} else {
// items is still null
}
And in your $http callbacks, you do the following:
$http.get(..., function(data) {
$scope.items = {
data: data,
// other stuff
};
});
sh...
CSS3 transition events
...fixed event:
element.addEventListener('transitionend', callback, false);
https://caniuse.com/#feat=css-transitions
I was using the approach given by Pete, however I have now started using the following
$(".myClass").one('transitionend webkitTransitionEnd oTransitionEnd otransitionend MSTransi...
In a bootstrap responsive page how to center a div
...tstrap 4
Simpler vertical grid alignement with flex-box
@import url('https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0-alpha.6/css/bootstrap.min.css');
html,
body {
height: 100%
}
<div class="h-100 row align-items-center">
<div class="col" style="background:red">
TEXT
...
RabbitMQ / AMQP: single queue, multiple consumers for same message?
...t solve your problem, but could be useful for people to know. example here http://www.rabbitmq.com/tutorials/tutorial-two-java.html under Fair Dispatch
– Ommit
Jan 27 '15 at 22:35
...