大约有 5,475 项符合查询结果（耗时：0.0094秒） [XML]
Pandas - Get first row value of a given column
...df = pd.DataFrame({'foo':list('ABC')}, index=[0,2,1])
In [24]: df['bar'] = 100
In [25]: df['bar'].iloc[0] = 99
/home/unutbu/data/binky/bin/ipython:1: SettingWithCopyWarning:
A value is trying to be set on a copy of a slice from a DataFrame
See the caveats in the documentation: http://pandas.pydata...
IOS: verify if a point is inside a rect
...ike this:
let point = CGPointMake(20,20)
let someFrame = CGRectMake(10,10,100,100)
let isPointInFrame = CGRectContainsPoint(someFrame, point)
Swift 3 version:
let point = CGPointMake(20,20)
let someFrame = CGRectMake(10,10,100,100)
let isPointInFrame = someFrame.contains(point)
Link to documen...
How to use a decimal range() step value?
... magnitude of i for the loop and then reduce it when you need it.
for i * 100 in range(0, 100, 10):
print i / 100.0
EDIT: I honestly cannot remember why I thought that would work syntactically
for i in range(0, 11, 1):
print i / 10.0
That should have the desired output.
...
PHP Regex to check date is in YYYY-MM-DD format
...nt dates pre-1900, then a minor tweak to Shyju answer will allow from year 1000 and is another 23 characters shorter: ^((([1-9]\d{3})\-(0[13578]|1[02])\-(0[1-9]|[12]\d|3[01]))|(((19|[2-9]\d)\d{2})\-(0[13456789]|1[012])\-(0[1-9]|[12]\d|30))|(([1-9]\d{3})\-02\-(0[1-9]|1\d|2[0-8]))|(([1-9]\d(0[48]|[24...
Giving UIView rounded corners
...it has square corners.
let blueView = UIView()
blueView.frame = CGRect(x: 100, y: 100, width: 100, height: 50)
blueView.backgroundColor = UIColor.blueColor()
view.addSubview(blueView)
You can give it round corners by changing the cornerRadius property of the view's layer.
blueView.layer.corne...
Selecting with complex criteria from pandas.DataFrame
...ndint(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 70 900
3 8 80 900
4 7 50 200
5 9 30 900
6 2 80 700
7 2 80 400
8 5 80 300
9 7 70 800
We can apply column operati...
Ruby's ||= (or equals) in JavaScript?
...r integers only. But you have to define the variable first.
let a = 0
a |= 100
console.log(a) // 100
For objects
let o = {}
o.a |= 100
console.log(o) // {a: 100}
For Arrays
let arr = []
arr[0] |= 100
console.log(arr) // [100]
...
Android Crop Center of Bitmap
...but then includes the remainder of the too long side. For instance given a 100x1000 image you get back a 100x550 image.
– Guvante
Mar 29 '13 at 19:38
...
How do I create a list of random numbers without duplicates?
I tried using random.randint(0, 100) , but some numbers were the same. Is there a method/module to create a list unique random numbers?
...
Leading zeros for Int in Swift
... String(format: "%03d", myInt) will give you "000", "001", ... , "099", "100".
– vacawama
Jul 15 '15 at 9:56
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