₦airaland Forum

efficiencie:
I was playing around with some stuff on decision trees and came up with the following problem. I was able to work out a solution but I think my solution may be too slow and I am hoping someone might have a faster alternative. Here is the problem:

Design a function that accepts a digit; say 'n', and returns a list of lists of unary digits between 0 and 'n-1', pairs of digits between 0 and 'n-1', triples of digits between 0 and 'n-1', up until the '(n-1)-tuple' digits between 0 and 'n-1'.

for example;

if n = 2 the function return: [[0], [1], [0, 1]]
if n = 3 the function returns: [[0], [1], [2], [0, 1], [0, 2], [1, 2], [0, 1, 2]]
if n = 4 the function returns: [[0], [1], [2], [3], [0, 1], [0, 2], [0, 3], [1, 2], [1, 3], [2, 3], [0, 1, 2], [0, 1, 3], [0, 2, 3], [1, 2, 3], [0, 1, 2, 3]]

cc ypeace, 4kings, Ajibel, adejumoadeoluwa, melodyogonna, alexis, Nobody and co

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ypeace:
Lolz, your one liner looks better. I think it will be faster too. Map takes in a function as its first arg and an iterable (list, set) as second arg. It then passes each element in the iterable to the function.

def add_five(X):
....return x + 5

[map(add_five, [1,2,3,4,5])] //[6, 7, 8, 9, 10]

efficiencie:
This one-liner is critical! Make I look am well! Anyways here is my one-liner. https://pastebin.com/L18nXV4f

# modified: @ypeace, could you please explain how map works in your one-liner!

efficiencie:
BEGINNER CHALLENGE (copied)

Sliding window array multiplication.

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dont reduce ajax usage, instead design your app to in a way that it doesnt rely heavily on ajax(improving code design, not reducing service quality, hope u get this?). i do advice coders not to be too trigger-happy with ajax; over-usage of ajax may result in rough backend codes in the hands of a less experienced developer; and unless u're a very talented web developer, you wont like the results of your segregated client js codes in the long run.
.
simply ensure the core functionality of your webpages doesnt rely heavily on ajax...that way, you wont have to work through unnecessary headache of browser detection and adaptation.
.
you can work with these rules
1. content first, chrome later. (study twitter.com)
2. your js should be useful and useful only. (dont write js for fun and show-off)
3. and off-course...avoid reinventing the wheel. use frameworks!
.
u can add yours

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