大约有 20,000 项符合查询结果（耗时：0.0355秒） [XML]
How do I convert a pandas Series or index to a Numpy array? [duplicate]
...
To get a NumPy array, you should use the values attribute:
In [1]: df = pd.DataFrame({'A': [1, 2, 3], 'B': [4, 5, 6]}, index=['a', 'b', 'c']); df
A B
a 1 4
b 2 5
c 3 6
In [2]: df.index.values
Out[2]: array(['a', 'b', 'c'], dtype=object)
This accesses how the data ...
How to find common elements from multiple vectors?
...
There might be a cleverer way to go about this, but
intersect(intersect(a,b),c)
will do the job.
EDIT: More cleverly, and more conveniently if you have a lot of arguments:
Reduce(intersect, list(a,b,c))
...
How do I zip two arrays in JavaScript? [duplicate]
...
Use the map method:
var a = [1, 2, 3]
var b = ['a', 'b', 'c']
var c = a.map(function(e, i) {
return [e, b[i]];
});
console.log(c)
DEMO
share
|
impro...
Default value in Go's method
...ault value in Go's function? I am trying to find this in the documentation but I can't find anything that specifies that this is even possible.
...
How to write an inline IF statement in JavaScript?
...t necessarily need jQuery. JavaScript alone will do this.
var a = 2;
var b = 3;
var c = ((a < b) ? 'minor' : 'major');
The c variable will be minor if the value is true, and major if the value is false.
This is known as a Conditional (ternary) Operator.
https://developer.mozilla.org/...
More elegant way of declaring multiple variables at the same time
To declare multiple variables at the "same time" I would do:
10 Answers
10
...
How to fix Git error: object file is empty?
...
I had a similar problem. My laptop ran out of battery during a git operation. Boo.
I didn't have any backups. (N.B. Ubuntu One is not a backup solution for git; it will helpfully overwrite your sane repository with your corrupted one.)
To th...
Are there pronounceable names for common Haskell operators? [closed]
...
Here is how I pronounce them:
>>= bind
>> then
*> then
-> to a -> b: a to b
<- bind (as it desugars to >>=)
<$> (f)map
<$ map-replace by 0 <$ f: "f map-replace by ...
Efficiently replace all accented characters in a string?
... speak to what you are trying to do specifically with the function itself, but if you don't like the regex being built every time, here are two solutions and some caveats about each.
Here is one way to do this:
function makeSortString(s) {
if(!makeSortString.translate_re) makeSortString.translat...
Aren't Python strings immutable? Then why does a + “ ” + b work?
My understanding was that Python strings are immutable.
22 Answers
22
...