DiegoSalazar

// Takes a credit card string value and returns true on valid number
function valid_credit_card(value) {
  // Accept only digits, dashes or spaces
	if (/[^0-9-\s]+/.test(value)) return false;

	// The Luhn Algorithm. It's so pretty.
	let nCheck = 0, bEven = false;
	value = value.replace(/\D/g, "");

	for (var n = value.length - 1; n >= 0; n--) {

index.html

<div class="container-fluid">
		<div class="row">
			<div class="col-lg-8 col-sm-8 col-12">
				<form method="POST" action=".">
		            <h4>Upload Prospects</h4>
		            <div class="form-group">
		                <span class="input-group-btn">
		                    <span class="btn btn-primary btn-file">
		                        Browse&hellip; <input type="file">
		                    </span>

0x263b

Random color from string in javascript

Consider a list of strings you need to permanently assign a random color.

First you should turn the string into a hash.

var string = "string"
var hash = 0

abel0b

// how to locate application data %AppData% directory path on Windows 10 MSVC
// see on documentation https://docs.microsoft.com/en-us/windows/win32/api/shlobj_core/nf-shlobj_core-shgetknownfolderpath?redirectedfrom=MSDN
// compiled with  cl .\appdata.c Shell32.lib

#include <stdlib.h>
#include <stdio.h>
#include <shlobj_core.h>
#include <direct.h>

int main() {