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Android存储系统基础知识：内部存储，外部存储，App特定目录 ASD(app speci...
... or
file:///storage/emulated/0/
要访问外部存储，需要 READ_ 或 WRITE_EXTERNAL_STORAGE 权限。
App特定目录 ASD(App-specific directory)
此外，可能还有一个特定于应用程序的目录（ASD），可以使用以下命令创建
...
How do I convert an enum to a list in C#? [duplicate]
...uperfluous, and will mean extra copying. Enum.GetValues returns an array already, so you just have to do var values = (SomeEnum[])Enum.GetValues(typeof(SomeEnum))
– thecoop
Nov 9 '10 at 2:33
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Will strlen be calculated multiple times if used in a loop condition?
...is only true if ss is not changed in for loop.
For example, if you use a read-only function on ss in for loop but don't declare the ss-parameter as const, the compiler cannot even know that ss is not changed in the loop and has to calculate strlen(ss) in every iteration.
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How to store date/time and timestamps in UTC time zone with JPA and Hibernate
...that they transform dates to/from the current JVM timezone by default when reading and writing from/to the database.
I came up with a solution to this in Hibernate 3.5 by subclassing org.hibernate.type.TimestampType that forces these JDBC methods to use UTC instead of the local time zone:
public c...
Why are elementwise additions much faster in separate loops than in a combined loop?
...
For anyone interested, here is good reading on memory alignment and here are several links on the way data is cached in memory
– New Alexandria
Dec 19 '11 at 4:24
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What's the _ underscore representative of in Swift References?
...e designers think it's obviously enough for your code and doesn't enchance readability, quite the contrary, it soils the code. So you get the warning. The reference has the opposite goal: it has to be as clear as it's possible - so the first parameter's underscore is mentioned for EVERY method. That...
getExtractedText on inactive InputConnection warning on android
...ipped 30 frames! The application may be doing too much work on its main thread.
My situation:
I have an EditText view the user types into. The EditText gets cleared when user presses a button. Lots of inactive InputConnection entries stream out when I rapidly press the button.
Ex:
editText.set...
Difference between Service, Async Task & Thread?
What is the difference between Service, Async Task & Thread. If i am not wrong all of them are used to do some stuff in background. So, how to decide which to use and when?
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How do I toggle an ng-show in AngularJS based on a boolean?
... Boolean in the controller. The weird thing is that this default value was read correctly by the ng-show on page load, but then after clicking on ng-click it would update only this ng-show, and not others in the page (all watching the same Boolean—at least in theory)...
– ant...
What's the difference between Unicode and UTF-8? [duplicate]
... as well as we should. If you feel you belong to this group, you should
read this ultra short introduction to character sets and encodings.
Actually, comparing UTF-8 and Unicode is like comparing apples and
oranges:
UTF-8 is an encoding - Unicode is a character
set
A character ...