大约有 43,000 项符合查询结果（耗时：0.0318秒） [XML]
How can I assign the output of a function to a variable using bash?
...
That's not 100% right. Command substitution always strips trailing newlines.
– TheBonsai
Nov 28 '09 at 17:36
7
...
Round to 5 (or other number) in Python
...
I don't know of a standard function in Python, but this works for me:
Python 2
def myround(x, base=5):
return int(base * round(float(x)/base))
Python3
def myround(x, base=5):
return base * round(x/base)
It is easy to see why the a...
Limit text length to n lines using CSS
...
There's a way to do it using unofficial line-clamp syntax, and starting with Firefox 68 it works in all major browsers.
body {
margin: 20px;
}
.text {
overflow: hidden;
text-overflow: ellipsis;
display: -webkit-box;
-webkit-line-clamp: 2; /* number of lin...
Python list subtraction operation
...set(x) - set(y))
>>> z
[0, 8, 2, 4, 6]
Or you might just have x and y be sets so you don't have to do any conversions.
share
|
improve this answer
|
follow
...
Converting a list to a set changes element order
...at when I am converting a list to set the order of elements is changed and is sorted by character.
11 Answers
...
Remove final character from string [duplicate]
...
What if you have a list of words and you want to delete the last character of every word? [blue, red, green] => [blu,re,gree] ?
– Jellyse
Apr 9 '18 at 10:19
...
How does git compute file hashes?
... | shasum
8ab686eafeb1f44702738c8b0f24f2567c36da6d
Source: http://alblue.bandlem.com/2011/08/git-tip-of-week-objects.html
share
|
improve this answer
|
follow
...
How do I upgrade my ruby 1.9.2-p0 to the latest patch level using rvm?
...2.
Finally, to install the new ruby version, just run rvm install 1.9.2 - and wait for it to compile!
share
|
improve this answer
|
follow
|
...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...ll TTY devices but you might want to exclude those pesky virtual terminals and pseudo terminals. I suggest you examine only those which have a device/driver entry:
# ll /sys/class/tty/*/device/driver
lrwxrwxrwx 1 root root 0 2012-03-28 19:07 /sys/class/tty/ttyS0/device/driver -> ../../../bus/pnp...
Data structure: insert, remove, contains, get random element, all at O(1)
...
Consider a data structure composed of a hashtable H and an array A. The hashtable keys are the elements in the data structure, and the values are their positions in the array.
insert(value): append the value to array and let i be its index in A. Set H[value]=i.
remove(value)...