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Stream vs Views vs Iterators
...n in itself. What makes it special in Scala is the fact that you can apply transformation such as map and filter and simply get a new Iterator which will only apply these transformations when you ask for the next element.
Scala used to provide iterators which could be reset, but that is very hard t...
Get the Row(s) which have the max count in groups using groupby
... of the original DF you can do:
In [3]: idx = df.groupby(['Mt'])['count'].transform(max) == df['count']
In [4]: df[idx]
Out[4]:
Sp Mt Value count
0 MM1 S1 a 3
3 MM2 S3 mk 8
4 MM2 S4 bg 10
8 MM4 S2 uyi 7
Note that if you have multiple max values per gr...
Concatenate strings in Less
...
For those string-like unit values like 45deg in transform: rotate(45deg) use the unit(value, suffix) function.
Example:
// Mixin
.rotate(@deg) {
@rotation: unit(@deg, deg);
-ms-transform: rotate(@rotation);
transform: rotate(@rotation);
}
// Usage
.rotate(45);
/...
Split column at delimiter in data frame [duplicate]
...('a|b','b|c','x|y'))
> df
ID FOO
1 11 a|b
2 12 b|c
3 13 x|y
> df = transform(df, FOO = colsplit(FOO, split = "\\|", names = c('a', 'b')))
> df
ID FOO.a FOO.b
1 11 a b
2 12 b c
3 13 x y
s...
Image fingerprint to compare similarity of many images
...to account.
If you need extremely robust fingerprinting, such that affine transformations (scaling, rotation, translation, flipping) are accounted for, you can use a Radon transformation on the image source to produce a normative mapping of the image data - store this with each image and then compa...
Monad in plain English? (For the OOP programmer with no FP background)
...e is a "bind" operation that takes a monadic value and a function that can transform the value, and returns a new monadic value. Bind is the key operation that defines the semantics of the monad. It lets us transform operations on the unamplified type into operations on the amplified type, that obey...
How do you create a Distinct query in HQL
... use the distinct SQL keyword, but in some situations it will use a result transformer to produce distinct results. For example when you are using an outer join like this:
select distinct o from Order o left join fetch o.lineItems
It is not possible to filter out duplicates at the SQL level in th...
How to stop an animation (cancel() does not work)
...mation). In your class you will be able to save and track position in applyTransformation() function.
– Mix
Nov 7 '10 at 21:23
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How to make CSS3 rounded corners hide overflow in Chrome/Opera
...
transform: translateY(0); is an alternative that achieves the same result without interfering with the visual representation of the object (unless you are using perspective).
– kontur
Ju...
How to normalize an array in NumPy?
...ere is also the function unit_vector() to normalize vectors in the popular transformations module by Christoph Gohlke:
import transformations as trafo
import numpy as np
data = np.array([[1.0, 1.0, 0.0],
[1.0, 1.0, 1.0],
[1.0, 2.0, 3.0]])
print(trafo.unit_vector(...