大约有 44,500 项符合查询结果（耗时：0.0433秒） [XML]
Detect current device with UI_USER_INTERFACE_IDIOM() in Swift
... the UI_USER_INTERFACE_IDIOM() macro is only required when targeting iOS 3.2 and below. When deploying to iOS 3.2 and up, you can use [UIDevice userInterfaceIdiom] directly.
share
|
improve this ans...
How can I get the full object in Node.js's console.log(), rather than '[Object]'?
... |
edited Sep 4 '18 at 18:28
Ikbel
6,07422 gold badges2828 silver badges3939 bronze badges
answered May ...
How to correctly close a feature branch in Mercurial?
...
218
One way is to just leave merged feature branches open (and inactive):
$ hg up default
$ hg me...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...
12 Answers
12
Active
...
Check if OneToOneField is None in Django
...
92
To check if the (OneToOne) relation exists or not, you can use the hasattr function:
if hasattr...
R programming: How do I get Euler's number?
For example, how would I go about entering the value e^2 in R?
3 Answers
3
...
What Ruby IDE do you prefer? [closed]
...
25 Answers
25
Active
...
Define a lambda expression that raises an Exception
... however allow you to conditionally raise exceptions, e.g.:
y = lambda x: 2*x if x < 10 else raise_(Exception('foobar'))
Alternatively you can raise an exception without defining a named function. All you need is a strong stomach (and 2.x for the given code):
type(lambda:0)(type((lambda:0)....
How do I request a file but not save it with Wget? [closed]
...
259
Use q flag for quiet mode, and tell wget to output to stdout with O- (uppercase o) and redirec...
How can I add numbers in a Bash script?
...
For integers:
Use arithmetic expansion: $((EXPR))
num=$((num1 + num2))
num=$(($num1 + $num2)) # Also works
num=$((num1 + 2 + 3)) # ...
num=$[num1+num2] # Old, deprecated arithmetic expression syntax
Using the external expr utility. Note that this is only needed for ...