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Difference between del, remove and pop on lists
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1423
The effects of the three different methods to remove an element from a list:
remove removes the...
How should I store GUID in MySQL tables?
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thaBadDawgthaBadDawg
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177
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How to map with index in Ruby?
...methods like map on. So you can do:
arr.each_with_index.map { |x,i| [x, i+2] }
In 1.8.6 you can do:
require 'enumerator'
arr.enum_for(:each_with_index).map { |x,i| [x, i+2] }
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adding noise to a signal in python
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122
You can generate a noise array, and add it to your signal
import numpy as np
noise = np.rando...
How does numpy.histogram() work?
...s aren't of equal width) of each bar.
In this example:
np.histogram([1, 2, 1], bins=[0, 1, 2, 3])
There are 3 bins, for values ranging from 0 to 1 (excl 1.), 1 to 2 (excl. 2) and 2 to 3 (incl. 3), respectively. The way Numpy defines these bins if by giving a list of delimiters ([0, 1, 2, 3]) in...
What are all the uses of an underscore in Scala?
...],T](a: K[T])
Ignored variables
val _ = 5
Ignored parameters
List(1, 2, 3) foreach { _ => println("Hi") }
Ignored names of self types
trait MySeq { _: Seq[_] => }
Wildcard patterns
Some(5) match { case Some(_) => println("Yes") }
Wildcard patterns in interpolations
"abc" matc...
App Inventor 2 与 Mixly（米思齐）MixIO 平台数据通信方案完整调研 - 创客...
App Inventor 2 与 Mixly（米思齐）MixIO 平台数据通信方案完整调研在少儿编程和创客教育领域，App Inventor 2 和 Mixly（米思齐）都是非常重要的图形化编程平台。很多老师和学习者都在问同一个问题：这两个平台之间能不能做数据通信...
How to get the difference between two arrays in JavaScript?
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Flatten nested dictionaries, compressing keys
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What are the differences between numpy arrays and matrices? Which one should I use?
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answered Apr 11 at 11:52
AksAks
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