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Charles Opute Odili chalu

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chalu / solution_1.js
Last active February 3, 2024 01:21
Remove Duplicates From Sorted Array II
// Leetcode Question
// https://leetcode.com/problems/remove-duplicates-from-sorted-array-ii/?envType=study-plan-v2&envId=top-interview-150
/**
* @param {number[]} nums
* @return {number}
*/
var removeDuplicates = function(nums) {
// ASC [1, 1, 1, 1, 1, 2, 2, 3, 4, 4, 5]
// index 0 1 2 3 4 5 6 7 8 9 10
@chalu
chalu / n-fibonacci-test.md
Last active August 28, 2023 08:47
n-fibonacci test

Create a function (e.g nFib) that takes a single integer parameter, n, and returns a list of the first n elements of the Fibonacci sequence.

Example in Javascript:

const nFib = (n) => {
  // TODDO solution begins here
  
  return [];
};
@chalu
chalu / avg_age.sql
Last active August 14, 2023 22:07
-- Given the data at https://gist.github.com/chalu/da81ea79bc95292e5c892621b002fe8f
-- how would you calculate the average age of the seniors.
-- I use the following ChatGPT prompt to get the formula for calculating their average age
-- "Given some age ranges like 45 - 54 and the number of people in each age range, how would you calculate the average age across all the age ranges"
-- I then wrote the below SQL
WITH age_range AS (
-- count seniors within each age range
SELECT SUM(
@chalu
chalu / seniors-ca-ab.csv
Created August 13, 2023 05:47
Gender Nursing Home City Quadrant Age 45-54 Age 55-64 Age 65-74 Age 75+
Female Maple Gardens North 12 18 25 35
Male Maple Gardens North 15 20 30 45
Female Sunflower Manor South 10 15 20 25
Male Sunflower Manor South 12 18 25 30
Female Rosewood Haven East 8 12 18 30
Male Rosewood Haven East 10 14 22 35
Female Oakridge Lodge West 18 25 35 50
Male Oakridge Lodge West 20 30 40 55
Female Aspen Meadows North 12 18 30 40
@chalu
chalu / parcel-plugin-static-files-copy.js
Created July 22, 2019 16:53
'use strict';
const fs = require('file-system');
const minimatch = require('minimatch');
const path = require('path');
const DEFAULT_CONFIG = {
'staticPath': [ 'static' ],
'watcherGlob': null
};
@chalu
chalu / freestyle-sample.js
Last active September 25, 2020 22:29
/* The API
================== */
const noop = () => { };
// abstract matcher
const match = (field = '', delegate = noop) => {
return (data = []) => {
return data.filter(entry => delegate(entry[field]));
}
@chalu
chalu / chain-of-chains.js
Created July 18, 2019 18:09
const getElligibleCustomers = chain(
customerAgeIsOrAbove(18),
isCustomerForMoreThan3Years,
totalItemsBoughtIsOver(50),
shippingAddressIsWithin(['Abuja', 'Lagos', 'Ibadan'])
);
const determineDiscountSale = chain(
getElligibleCustomers,
discountOrdersAt('15%'),
@chalu
chalu / chain-api.js
Created July 18, 2019 18:08
const chain = (...fns) => {
return (data) => {
return fns.reduce((computed, fn) => {
return fn(computed);
}, data);
};
};
// use as
// chain(steps)(initialData)
@chalu
chalu / concrete-matchers.js
Created July 18, 2019 18:05
const is = (target) => (value) => value === target;
const isOver = (target) => (value) => value > target;
const isUnder = (target) => (value) => value < target;
const isOrOver = (target) => (value) => value >= target;
const isOrUnder = (target) => (value) => value <= target;
const isMultipleOf = (target) => (value) => value % target === 0;
// thus, easy to make isEven, isOdd, isPrime, isEnabled, isConnected, isStared
// isFavorite, is404, isImageResponse e.t.c
@chalu
chalu / match.js
Created July 18, 2019 18:04
const match = (field, delegate) => {
return (data = []) => {
return data.filter(entry => delegate(entry[field]));
}
};