大约有 6,885 项符合查询结果（耗时：0.0204秒） [XML]
How do I apply the for-each loop to every character in a String?
... complete without the caveat that this may be less efficient than a simple indexed loop.
– toolforger
Nov 10 '18 at 22:20
add a comment
|
...
How to randomly select an item from a list?
...
If you also need the index, use random.randrange
from random import randrange
random_index = randrange(len(foo))
print(foo[random_index])
share
|
...
Android layout replacing a view with another view on run time
... = findViewById(R.id.C);
ViewGroup parent = (ViewGroup) C.getParent();
int index = parent.indexOfChild(C);
parent.removeView(C);
C = getLayoutInflater().inflate(optionId, parent, false);
parent.addView(C, index);
If you don't want to replace already existing View, but choose between option1/option...
How do you send a HEAD HTTP request in Python 2?
...tplib.HTTPConnection("www.google.com")
>>> conn.request("HEAD", "/index.html")
>>> res = conn.getresponse()
>>> print res.status, res.reason
200 OK
>>> print res.getheaders()
[('content-length', '0'), ('expires', '-1'), ('server', 'gws'), ('cache-control', 'privat...
How to iterate over the keys and values in an object in CoffeeScript?
...ng array comprehension, which can be used as a one-line loop.
console.log index + ": " + elm for index, elm of array
Array comprehension are:
"Comprehensions replace (and compile into) for loops, with optional
guard clauses and the value of the current array index. Unlike for
loops, array...
AngularJS Folder Structure [closed]
... app.js
/views
/styles
/img
/bower_components
index.html
bower.json
And after grunt build (concat, uglify, rev, etc...):
/scripts
scripts.min.js (all JS concatenated, minified and grunt-rev)
vendor.min.js (all bower components concatenated, minifi...
Android - get children inside a View?
...
for(int index = 0; index < ((ViewGroup) viewGroup).getChildCount(); index++) {
View nextChild = ((ViewGroup) viewGroup).getChildAt(index);
}
Will that do?
...
Applying .gitignore to committed files
...to leave the file in the repo but ignore future changes to it:
git update-index --assume-unchanged <file>
and to undo this:
git update-index --no-assume-unchanged <file>
to find out which files have been set this way:
git ls-files -v|grep '^h'
credit for the original answer to
...
How to use Python's pip to download and keep the zipped files for a package?
...IRC, I had to use sudo pip install <path-to-downloaded-package> --no-index --find-links `pwd`
– knocte
Nov 30 '16 at 9:09
...
Import multiple csv files into pandas and concatenate into one DataFrame
....csv")
li = []
for filename in all_files:
df = pd.read_csv(filename, index_col=None, header=0)
li.append(df)
frame = pd.concat(li, axis=0, ignore_index=True)
share
|
improve this answer
...