大约有 45,000 项符合查询结果（耗时：0.0675秒） [XML]
Remove array element based on object property
...
filter() creates a new array, which is fine if you're able to reassign the variable and know that there aren't other areas of code that have references to it. This won't work if you specifically need to modify the original array object.
– Brian G...
change text of button and disable button in iOS
...
Hey Namratha,
If you're asking about changing the text and enabled/disabled state of a UIButton, it can be done pretty easily as follows;
[myButton setTitle:@"Normal State Title" forState:UIControlStateNormal]; // To set the title
[myButt...
Getting the folder name from a path
...s approach, does however, rely on the path initially ending in a filename. If it's unknown whether the path ends in a filename or folder name - then it requires that you check the actual path to see if a file/folder exists at the location first. In that case, Dan Dimitru's answer may be more appropr...
micro:bit 微控制器教程 · App Inventor 2 中文网
...t 传感器数据：
// 定期请求温度数据
when Clock1.Timer
do
if BluetoothLE1.IsConnected then
call BluetoothLE1.RequestTemperature
// 处理温度数据
when BluetoothLE1.TemperatureReceived temperature
do
set Label_Temperature.Text to "温度: " & temperature & "°C"
...
Insert space before capital letters
...
@ToniMichelCaubet easy, modify the regex like this: /([A-Z]+)/g. The + will make sure you match as many consecutive capital letters as possible.
– iFreilicht
May 18 '17 at 11:18
...
How to make a smooth image rotation in Android?
...ion XML:
android:interpolator="@anim/linear_interpolator"
Special Note: If your rotate animation is inside a set, setting the interpolator does not seem to work. Making the rotate the top element fixes it. (this will save your time.)
...
In bash, how does one clear the current input?
... Don't get used to that, use Ctrl-U. Ctrl-C is not that bad in bash, but if you have e.g. a mysql client prompt, Ctrl-C will disconnect from the server which is really annoying.
– Christian
Nov 25 '13 at 10:54
...
Case insensitive replace
...
If you're only doing a single replace, or want to save lines of code, it's more efficient to use a single substitution with re.sub and the (?i) flag: re.sub('(?i)' + re.escape('hippo'), 'giraffe', 'I want a hIPpo for my birth...
Where are iOS simulator screenshots stored?
...
If you create screenshots from within the simulator using File -> Save Screen Shot (Command-S), those files end up on the Desktop as something like: iOS Simulator Screen shot Apr 22, 2012.png.
Under Xcode 6 & newer, de...
What is the purpose of the reader monad?
...nstance Functor (Reader env) where
fmap f (Reader g) = Reader $ f . g
Now, to get a monad:
instance Monad (Reader env) where
return x = Reader (\_ -> x)
(Reader f) >>= g = Reader $ \x -> runReader (g (f x)) x
which is not so scary. ask is really simple:
ask = Reader $ \x -...