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Fastest way to remove first char in a String
...g, so you need to do that on the random strings, that you pre-populated an array (list) with, and randomly select the element of that array (list).
– ajeh
Sep 9 '16 at 19:51
a...
How do I calculate a point on a circle’s circumference?
...n x
* @param {number} input.cy - The circle's origin y
* @returns {Array[number,number]} The calculated x and y
*/
function pointsOnCircle({ radius, angle, cx, cy }){
angle = angle * ( Math.PI / 180 ); // Convert from Degrees to Radians
const x = cx + radius * Math.cos(angle);
c...
Assign one struct to another in C
...ve Complex datatypes in a structure. Here COMPLEX means that you cant have array of pointers ,pointing to lists.
An array of characters within a structure will itself not work on most compilers, this is because assignment will simply try to copy without even looking at the datatype to be of compl...
Java: when to use static methods
...tate. But when you're testing stateless static methods like Math.abs() or Arrays.sort(), even methods you can pass all dependencies into, I don't see how that would ever impede unit testing. I would say a simple rule of thumb is: if you'd ever have any reason to mock out the procedural logic, then...
GroupBy pandas DataFrame and select most common value
...does not have a 'Short name' attribute.
stats.mode returns a tuple of two arrays, so you have to take the first element of the first array in this tuple.
With these two simple changements:
source.groupby(['Country','City']).agg(lambda x: stats.mode(x)[0][0])
returns
Sh...
What is the difference between ? and Object in Java generics?
... in fact a subtype of Object[], that's one of the reasons why generics and arrays don't mix well. (arrays in Java are covariant, generics are not, they are invariant)).
Sample:
If you'd like to write a method that accepts Lists of InputStreams and subtypes of InputStream, you'd write
public void f...
In Go's http package, how do I get the query string on a POST request?
...
I found it interesting req.Form is empty array unless req.formValue("some_field") is invoked at lease once.
– Qian Chen
Jun 21 '15 at 14:51
...
What is the most pythonic way to check if an object is a number?
...n should cover all normal and sane code that you generate/encouter.
numpy.array example:
import numpy as np
def isNumber(x):
try:
return bool(x*0 == 0)
except:
return False
x = np.array([0,1])
answer = isNumber(x)
print('{answer} == isNumber({x})'.format(**locals()))
o...
Literal notation for Dictionary in C#?
...ogrammed in C#. In JavaScript, I can pass data easily using an associative array:
4 Answers
...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...
2 c 3
3 d 4
4 e 5
Try:
# Get the values out to a 2-D numpy array,
df.values
[out]:
array([['a', 1],
['b', 2],
['c', 3],
['d', 4],
['e', 5]], dtype=object)
Then optionally:
# Dump it into a list so that you can sort it using `sorted()`
sorted(df.val...