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How to convert a java.util.List to a Scala list
...s._
will do implicit conversion for you; e.g.:
var list = new java.util.ArrayList[Int](1,2,3)
list.foreach{println}
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Is a `=default` move constructor equivalent to a member-wise move constructor?
...d/moved in the manner appropriate to its type:
if the member is an array, each element is direct-initialized with the corresponding subobject of x;
if a member m has rvalue reference type T&&, it is direct-initialized with static_cast(x.m);
otherwise, the base or member is direct...
Loop through properties in JavaScript object with Lodash
...fetch all the key in the obj
let keys = Object.keys(obj) //it will return array of keys
and then loop through it
keys.forEach(key => //your way)
just putting all together
Object.keys(obj).forEach(key=>{/*code here*/})
...
Select rows of a matrix that meet a condition
...ction , and I personally find it useless.
I assume you have a data.frame, array, matrix called Mat with A, B, C as column names; then all you need to do is:
In the case of one condition on one column, lets say column A
Mat[which(Mat[,'A'] == 10), ]
In the case of multiple conditions on differ...
How to check if a given directory exists in Ruby
...
File.exist?("directory")
Dir[] returns an array, so it will never be nil. If you want to do it your way, you could do
Dir["directory"].empty?
which will return true if it wasn't found.
sha...
javascript: recursive anonymous function?
...eed to keep track of additional state?
We could use compound data like an Array or something...
const U = f => f (f)
const Y = U (h => f => f (x => U (h) (f) (x)))
const fibonacci = Y (f => ([a, b, x]) =>
x === 0 ? a : f ([b, a + b, x - 1]))
// starting with 0 and...
How to add title to subplots in Matplotlib?
... in Line 1 of code
and you can set its title inside a loop.
The rows of 2D array is length (len) of axis(ax)
Each row has 2 items i.e. It is list within a list (Point No.2)
set_title can be used to set title, once the proper axes(ax) or subplot is selected.
import matplotlib.pyplot as plt
fig...
Select 50 items from list at random to write to file
...,23]
np.random.choice(mylist, 3, replace=False)
the function returns an array of 3 randomly chosen values from the list
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JSON datetime between Python and JavaScript
...uctures within an object. ISO date
strings, which are items of a top-level array will not be decoded.
I.e. this works:
date = datetime.datetime.now()
>>> json = dumps(dict(foo='bar', innerdict=dict(date=date)))
>>> json
'{"innerdict": {"date": "2010-07-15T13:16:38.365579"}, "foo"...
Strange \n in base64 encoded string in Ruby
...ctually using the b64encode method.
It seems the pack("m") method for the Array class used by encode64 also adds the newlines. I would consider it a design bug that this is not optional.
You could either remove the newlines yourself, or if you're using rails, there's ActiveSupport::CoreExtensions:...