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Async Procedures 拓展：异步任务拓展，异步处理耗时任务 - App Inventor 2...
Async ProcAsync Proc is an Extension which you can use to run a Procedure asynchronously. You no longer have to wait for a loop to finish and don’t worry about your app Crashing due to Android System thinking that your app crashed while doing intense processes.BLOCKS:EVENTS :
[color=var(--tertiar...
How to close Android application?
...t unless a navigation event by the user or the app occurs.
*
* @param killSafely
* Primitive boolean which indicates whether the app should be
* killed safely or quickly when the HOME key is pressed.
*
* @see {@link UIHelper.killApp}
*/
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How do I declare an array of weak references in Swift?
...ements should be. I think Cocoa NSPointerArray offers a non-typesafe version of this.
18 Answers
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How to read a large file - line by line?
...with statement handles opening and closing the file, including if an exception is raised in the inner block. The for line in f treats the file object f as an iterable, which automatically uses buffered I/O and memory management so you don't have to worry about large files.
There should be one --...
PCH File in Xcode 6
In my previous projects, I can find the .pch file under Supporting Files.
6 Answers
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Redefining NULL
...L pointer will remain undetected and at the same time cause dangerous behaviour.
7 Answers
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What is the difference between the Data Mapper, Table Data Gateway (Gateway), Data Access Object (DA
...ory short:
the Data Mapper will receive the Domain Model object(Entity) as param and will use it to implement the CRUD operations
the Table Data Gateway will receives all the params(as primitives) for the methods and will not know anything about the Domain Model object(Entity).
In the end both of t...
How to add images in select list?
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In Firefox you can just add background image to option:
<select>
<option style="background-image:url(male.png);">male</option>
<option style="background-image:url(female.png);">female</option>
<option style="background-image:url(others....
lsof survival guide [closed]
...and-line utility for unix systems. It lists open files, displaying information about them. And since most everything is a file on unix systems, lsof can give sysadmins a ton of useful diagnostic data.
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Where can I download Spring Framework jars without using Maven?
SpringSource.org changed their site to http://spring.io
1 Answer
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