大约有 45,000 项符合查询结果（耗时：0.0352秒） [XML]
Attach parameter to button.addTarget action in Swift
...tton.addTarget(self, action: #selector(YourViewController.webButtonTouched(_:)), for:.touchUpInside)
webButton.params["myvalue"] = "bob"
then finally catch it all here
@IBAction func webButtonTouched(_ sender: PassableUIButton) {
print(sender.params["myvalue"] ?? "")
}
You do this one time ...
Understanding slice notation
...asic sequences don't support them.
>>> class slicee:
... def __getitem__(self, item):
... return repr(item)
...
>>> slicee()[0, 1:2, ::5, ...]
'(0, slice(1, 2, None), slice(None, None, 5), Ellipsis)'
...
ViewPager and fragments — what's the right way to store fragment's state?
... onCreate(Bundle savedInstanceState) {
setContentView(R.layout.activity_main);
if (savedInstanceState != null)
viewpagerid=savedInstanceState.getInt("viewpagerid", -1 );
MyFragmentPagerAdapter titleAdapter = new MyFragmentPagerAdapter (getSupportFragmentManager() , this); ...
Rename a dictionary key
...
For a regular dict, you can use:
mydict[new_key] = mydict.pop(old_key)
For an OrderedDict, I think you must build an entirely new one using a comprehension.
>>> OrderedDict(zip('123', 'abc'))
OrderedDict([('1', 'a'), ('2', 'b'), ('3', 'c')])
>>>...
Adding custom radio buttons in android
...ransparent:
<RadioButton
android:id="@+id/radio0"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@null"
android:button="@drawable/yourbuttonbackground"
android:checked="true"
android:text="RadioButton1" />
If you would ...
Is there a way for multiple processes to share a listening socket?
...rt socket
import os
def main():
serversocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
serversocket.bind(("127.0.0.1", 8888))
serversocket.listen(0)
# Child Process
if os.fork() == 0:
accept_conn("child", serversocket)
accept_conn("parent", serversocket)
...
Deep copy of a dict in python
...or "license" for more information.
>>> import copy
>>> my_dict = {'a': [1, 2, 3], 'b': [4, 5, 6]}
>>> my_copy = copy.deepcopy(my_dict)
>>> my_dict['a'][2] = 7
>>> my_copy['a'][2]
3
>>>
...
How to concatenate two MP4 files using FFmpeg?
...puts).
ffmpeg -i opening.mkv -i episode.mkv -i ending.mkv \
-filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a]
concat=n=3:v=1:a=1 [v] [a]" \
-map "[v]" -map "[a]" output.mkv
Note that this method performs a re-encode.
2. concat demuxer
Use this method wh...
Quick easy way to migrate SQLite3 to MySQL? [closed]
...two file formats:
The lines starting with:
BEGIN TRANSACTION
COMMIT
sqlite_sequence
CREATE UNIQUE INDEX
are not used in MySQL
SQLite uses CREATE TABLE/INSERT INTO "table_name" and MySQL uses CREATE TABLE/INSERT INTO table_name
MySQL doesn't use quotes inside the schema definition
MySQL uses singl...
How do I best silence a warning about unused variables?
...
This is how Q_UNUSED is implemented in principle.
– Dmitry Volosnykh
Jan 17 '12 at 11:02
11
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