大约有 41,000 项符合查询结果（耗时：0.0567秒） [XML]
Convert decimal to hexadecimal in UNIX shell script
...
echo "obase=16; 34" | bc
If you want to filter a whole file of integers, one per line:
( echo "obase=16" ; cat file_of_integers ) | bc
share
|
...
Ruby function to remove all white spaces?
...
54
\s+ means 1 or more whitespace characters (space, newline, tab). The // surrounding show that it's a regular expression.
...
A Regex that will never be matched by anything
...nd only then not find the "a" and return a negative match. I see it take ~480ms to scan a ~275k line file. The converse "a^" takes about the same time, even if it might seem more efficient. On the other hand, a negative lookahead need not scan anything: "(?!x)x" (anything not followed by an x als...
How to run a python script from IDLE interactive shell?
...
145
Python3:
exec(open('helloworld.py').read())
If your file not in the same dir:
exec(open('./...
Codesign error: Certificate identity appearing twice
CodeSign error: Certificate identity 'iPhone Developer: XXXX (12345678)' appears more than once in the keychain. The codesign tool requires there only be one.
...
How to construct a timedelta object from a simple string
...as a string. The user must enter something like "32m" or "2h32m", or even "4:13" or "5hr34m56s"... Is there a library or something that has this sort of thing already implemented?
...
dropping infinite values from dataframes in pandas?
...
445
The simplest way would be to first replace infs to NaN:
df.replace([np.inf, -np.inf], np.nan)...
Replacing instances of a character in a string
...
answered Oct 4 '12 at 9:01
Martijn Pieters♦Martijn Pieters
839k212212 gold badges32203220 silver badges28102810 bronze badges
...
What do people find difficult about C pointers? [closed]
...
William Pursell
162k4343 gold badges235235 silver badges267267 bronze badges
answered Oct 26 '10 at 17:30
jkerianjkerian
...
Why are these constructs using pre and post-increment undefined behavior?
...
14 Answers
14
Active
...