大约有 46,000 项符合查询结果（耗时：0.0633秒） [XML]
What is the most efficient way to concatenate N arrays?
...catenating more than two arrays, concat() is the way to go for convenience and likely performance.
var a = [1, 2], b = ["x", "y"], c = [true, false];
var d = a.concat(b, c);
console.log(d); // [1, 2, "x", "y", true, false];
For concatenating just two arrays, the fact that push accepts multiple ar...
Can I scroll a ScrollView programmatically in Android?
... answered Jun 22 '11 at 10:16
AndroidAndroid
8,18288 gold badges6161 silver badges104104 bronze badges
...
What is the C# Using block and why should I use it? [duplicate]
...eDisposableType()) {
OperateOnType(u);
}
The second is easier to read and maintain.
share
|
improve this answer
|
follow
|
...
Fatal error: unexpectedly found nil while unwrapping an Optional values [duplicate]
...e is first set. In these cases, it
is useful to remove the need to check and unwrap the optional’s value
every time it is accessed, because it can be safely assumed to have a
value all of the time.
These kinds of optionals are defined as implicitly unwrapped
optionals. You write an im...
How can I convert string to datetime with format specification in JavaScript?
...ave to parse the string yourself (should be easy with regular expressions) and create a new Date object with explicit values for year, month, date, hour, minute and second.
share
|
improve this answ...
IOException: read failed, socket might closed - Bluetooth on Android 4.3
...trange Exception when opening a BluetoothSocket on my Nexus 7 (2012), with Android 4.3 (Build JWR66Y, I guess the second 4.3 update). I have seen some related postings (e.g. https://stackoverflow.com/questions/13648373/bluetoothsocket-connect-throwing-exception-read-failed ), but none seems to prov...
How to change time and timezone in iPhone simulator?
How do I change time and time zone in the iPhone simulator?
11 Answers
11
...
Windows can't find the file on subprocess.call()
...
When the command is a shell built-in, add a 'shell=True' to the call.
E.g. for dir you would type:
import subprocess
subprocess.call('dir', shell=True)
To quote from the documentation:
The only time you need to specify shell=True ...
Mockito - difference between doReturn() and when()
...e thing or what is the subtle difference between doReturn(...).when(...) and when(...).thenReturn(...) ?
5 Answers
...
Define an 's src attribute in CSS [duplicate]
... can change the size of the image this way by using background-size:cover, and then changing the height and width.
– Lee
Oct 28 '15 at 15:15
1
...