大约有 44,572 项符合查询结果（耗时：0.0317秒） [XML]
python tuple to dict
For the tuple, t = ((1, 'a'),(2, 'b'))
dict(t) returns {1: 'a', 2: 'b'}
6 Answers
...
How to pass a single object[] to a params object[]
...at you mean in this case.
Foo((object)new object[]{ (object)"1", (object)"2" }));
As an array is a subtype of object, this all works out. Bit of an odd solution though, I'll agree.
share
|
improv...
How to not run an example using roxygen2?
...
answered Aug 20 '12 at 13:03
GSeeGSee
43.4k1111 gold badges108108 silver badges134134 bronze badges
...
How to check whether a pandas DataFrame is empty?
...
Dave Thomas
1,38922 gold badges1010 silver badges1616 bronze badges
answered Nov 7 '13 at 5:55
aIKidaIKid
...
Append a dictionary to a dictionary [duplicate]
...
525
You can do
orig.update(extra)
or, if you don't want orig to be modified, make a copy first:
...
Python class inherits object
...nherit from object?
In Python 3, apart from compatibility between Python 2 and 3, no reason. In Python 2, many reasons.
Python 2.x story:
In Python 2.x (from 2.2 onwards) there's two styles of classes depending on the presence or absence of object as a base-class:
"classic" style classes: t...
How can I convert a dictionary into a list of tuples?
...
>>> d = { 'a': 1, 'b': 2, 'c': 3 }
>>> d.items()
[('a', 1), ('c', 3), ('b', 2)]
>>> [(v, k) for k, v in d.iteritems()]
[(1, 'a'), (3, 'c'), (2, 'b')]
It's not in the order you want, but dicts don't have any specific order anyway...
Is there a difference between x++ and ++x in java?
...
293
++x is called preincrement while x++ is called postincrement.
int x = 5, y = 5;
System.out....
Ruby, remove last N characters from a string?
...
Ruby 2.5+
As of Ruby 2.5 you can use delete_suffix or delete_suffix! to achieve this in a fast and readable manner.
The docs on the methods are here.
If you know what the suffix is, this is idiomatic (and I'd argue, even more r...
Select count(*) from multiple tables
...an I select count(*) from two different tables (call them tab1 and tab2 ) having as result:
18 Answers
...