大约有 44,600 项符合查询结果（耗时：0.0412秒） [XML]
Can grep show only words that match search pattern?
...
Dan MidwoodDan Midwood
14.1k33 gold badges2626 silver badges3131 bronze badges
10
...
Find an element in a list of tuples
...
240
If you just want the first number to match you can do it like this:
[item for item in a if it...
Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
... O(N), but since the numbers grow at an exponential rate it is actually O(N2) due to the complexity of multiplying the large numbers. Below is a Python implementation. It takes about 0.5 seconds to calculate for N=50,000.
def max_chars(n):
dp = [0] * (n+1)
for i in xrange(n):
dp[i+1] = max(...
Convert tuple to list and back
...
298
Convert tuple to list:
>>> t = ('my', 'name', 'is', 'mr', 'tuple')
>>> t
('...
Unique (non-repeating) random numbers in O(1)?
...
22 Answers
22
Active
...
inject bean reference into a Quartz job in Spring?
...
20 Answers
20
Active
...
JavaScript Regular Expression Email Validation [duplicate]
...ine it as a regular expression:
var pattern = /^\w+@[a-zA-Z_]+?\.[a-zA-Z]{2,3}$/;
BTW, please don't validate email addresses on the client-side. Your regular expression is way too simple to pass for a solid implementation anyway.
See the real thing here: http://www.ex-parrot.com/~pdw/Mail-RFC...
How do I get bash completion to work with aliases?
...
12 Answers
12
Active
...
Best way to convert strings to symbols in hash
...
1
2
Next
255
...
Python using enumerate inside list comprehension
... the result that gets returned is as expected:
> [(0, 'a'), (1, 'b'), (2, 'c'), (3, 'd')]
share
|
improve this answer
|
follow
|
...