大约有 44,000 项符合查询结果（耗时：0.0571秒） [XML]
curl : (1) Protocol https not supported or disabled in libcurl
I'm trying to install the Rails environments on Ubuntu 11.04. When I launch the command rvm install 1.9.2 --with-openssl-dir=/usr/local the following error is received:
...
Calculating Pearson correlation and significance in Python
...
16 Answers
16
Active
...
Selecting with complex criteria from pandas.DataFrame
...; from random import randint
>>> df = pd.DataFrame({'A': [randint(1, 9) for x in range(10)],
'B': [randint(1, 9)*10 for x in range(10)],
'C': [randint(1, 9)*100 for x in range(10)]})
>>> df
A B C
0 9 40 300
1 9 70 700
2 5 70 90...
How do I get PHP errors to display?
...
This always works for me:
ini_set('display_errors', '1');
ini_set('display_startup_errors', '1');
error_reporting(E_ALL);
However, this doesn't make PHP to show parse errors - the only way to show those errors is to modify your php.ini with this line:
display_errors = on
(...
Python memoising/deferred lookup property decorator
...
12
For all sorts of great utilities I'm using boltons.
As part of that library you have cachedpro...
What is the difference between an int and a long in C++?
...
112
It is implementation dependent.
For example, under Windows they are the same, but for examp...
Generating all permutations of a given string
...
1
2
Next
607
...
Getting multiple keys of specified value of a generic Dictionary?
...
15 Answers
15
Active
...
Python: Select subset from list based on index set
...
126
You could just use list comprehension:
property_asel = [val for is_good, val in zip(good_obje...