大约有 44,505 项符合查询结果（耗时：0.0468秒） [XML]
How to clone ArrayList and also clone its contents?
How can I clone an ArrayList and also clone its items in Java?
21 Answers
21
...
This type of CollectionView does not support changes to its SourceCollection from a thread different
...nce your ObservableCollection is created on UI thread, you can only modify it from UI thread and not from other threads. This is termed as thread affinity.
If you ever need to update objects created on UI thread from different thread, simply put the delegate on UI Dispatcher and that will do work f...
How to programmatically get iOS status bar height
I know that currently the status bar (with the time, battery, and network connection) at the top of the iPhone/iPad is 20 pixels for non-retina screens and 40 pixels for retina screens, but to future proof my app I would like to be able to determine this without hard coding values. Is it possible to...
How can I make setInterval also work when a tab is inactive in Chrome?
...ond. This works great, however when I select another tab (so that the tab with my code becomes inactive), the setInterval is set to an idle state for some reason.
...
PHP & mySQL: Year 2038 Bug: What is it? How to solve it?
...g of using TIMESTAMP to store the date+time, but I read that there is a limitation of year 2038 on it. Instead of asking my question in bulk, I preferred to break it up into small parts so that it is easy for novice users to understand as well. So my question(s):
...
Making a private method public to unit test it…good idea?
...
Note:
This answer was originally posted for the question Is unit testing alone ever a good reason to expose private instance variables via getters? which was merged into this one, so it may be a tad specific to the usecase presented there.
As a general statement, I'm usually all for ...
In JavaScript, why is “0” equal to false, but when tested by 'if' it is not false by itself?
...
The reason is because when you explicitly do "0" == false, both sides are being converted to numbers, and then the comparison is performed.
When you do: if ("0") console.log("ha"), the string value is being tested. Any non-empty string is true, while an empty s...
How can I detect if a selector returns null?
...
My favourite is to extend jQuery with this tiny convenience:
$.fn.exists = function () {
return this.length !== 0;
}
Used like:
$("#notAnElement").exists();
More explicit than using length.
...
What is the correct way to start a mongod service on linux / OS X?
I've installed mongodb and have been able to run it, work with it, do simple DB read / write type stuff. Now I'm trying to set up my Mac to run mongod as a service.
...
Disable firefox same origin policy
...king on the latest Firefox (build 36.0.1) released March 5, 2015.
I tested it and it's working on both Windows 7 and Mavericks. I'll guide you throught the steps to get it working.
1) Getting the extension
You can either download the xpi from here (author builds) or from here
(mirror, may not be ...