大约有 44,000 项符合查询结果（耗时：0.0502秒） [XML]
An efficient way to transpose a file in Bash
...
115
awk '
{
for (i=1; i<=NF; i++) {
a[NR,i] = $i
}
}
NF>p { p = NF }
END {...
Convert hyphens to camel case (camelCase)
...
13 Answers
13
Active
...
Reusable library to get human readable version of file size?
... unit in ['','Ki','Mi','Gi','Ti','Pi','Ei','Zi']:
if abs(num) < 1024.0:
return "%3.1f%s%s" % (num, unit, suffix)
num /= 1024.0
return "%.1f%s%s" % (num, 'Yi', suffix)
Supports:
all currently known binary prefixes
negative and positive numbers
numbers larger tha...
How to flatten only some dimensions of a numpy array
...
129
Take a look at numpy.reshape .
>>> arr = numpy.zeros((50,100,25))
>>> arr.s...
How to use GROUP BY to concatenate strings in SQL Server?
...
18 Answers
18
Active
...
Should I use a data.frame or a matrix?
...
177
Part of the answer is contained already in your question: You use data frames if columns (vari...
How do write IF ELSE statement in a MySQL query
...
150
You probably want to use a CASE expression.
They look like this:
SELECT col1, col2, (case wh...
undefined method `source_index' for Gem:Module (NoMethodError)
...to this problem myself while trying to upgrade an older Rails app from REE 1.8.7 to 1.9.3-p385. Oddly, Ruby 1.9.3-p327 works just fine. What it came down to was ruby-1.9.3-p385 had installed RubyGems version 2.0.2 for me, and 1.9.3-p327 has RubyGems v1.8.23 installed.
Gem.source_index has been depr...
iOS 7 TableView like in Settings App on iPad
...
15 Answers
15
Active
...