大约有 16,000 项符合查询结果（耗时：0.0315秒） [XML]
Unpacking a list / tuple of pairs into two lists / tuples [duplicate]
...
>>> source_list = ('1','a'),('2','b'),('3','c'),('4','d')
>>> list1, list2 = zip(*source_list)
>>> list1
('1', '2', '3', '4')
>>> list2
('a', 'b', 'c', 'd')
Edit: Note that zip(*iterable) is its own inverse:
>>> list(sou...
How to expand a list to function arguments in Python [duplicate]
...
It exists, but it's hard to search for. I think most people call it the "splat" operator.
It's in the documentation as "Unpacking argument lists".
You'd use it like this: foo(*values). There's also one for dictionaries:
d = {'a': 1, ...
How do I fetch a branch on someone else's fork on GitHub? [duplicate]
I've forked from a repo on GitHub. I want to get the code from a branch on another user's fork.
2 Answers
...
Android - Round to 2 decimal places [duplicate]
I know that there are plenty of examples on how to round this kind numbers.
But could someone show me how to round double, to get value that I can display as a
String and ALWAYS have 2 decimal places?
...
find first sequence item that matches a criterion [duplicate]
What would be the most elegant and efficient way of finding/returning the first list item that matches a certain criterion?
...
Correct use of transactions in SQL Server
I have 2 commands and need both of them executed correctly or none of them executed. So I think I need a transaction, but I don't know how to use it correctly.
...
What does the 'u' symbol mean in front of string values? [duplicate]
...ct that you're seeing the u means you're on Python 2 - strings are Unicode by default on Python 3, but on Python 2, the u in front distinguishes Unicode strings. The rest of this answer will focus on Python 2.
You can create a Unicode string multiple ways:
>>> u'foo'
u'foo'
>>> uni...
How to merge multiple lists into one list in python? [duplicate]
...'] + ['was'] + ['annoying']
You should read the Python tutorial to learn basic info like this.
share
|
improve this answer
|
follow
|
...
Recommended way of getting data from the server
...
There are cases when $resource may not be appropriate when talking to backend. This shows how to set up $resource like behavior without using resource.
angular.module('myApp').factory('Book', function($http) {
// Book is a class which we can use for retrieving ...
Testing for empty or nil-value string [duplicate]
I'm trying to set a variable conditionally in Ruby. I need to set it if the variable is nil or empty (0 length string). I've come up with the following:
...