Professional fullstack dev since 2017
Convert a JSON object to an array
json2array({"thing1":{"key1":"value"},"thing2":{"otherKey":"otherVal"}});
[{"key1":"value","key":"thing1"},{"otherKey":"otherVal","key":"otherVal"}]
function json2array(json) {
var result = [];
var keys = Object.keys(json);
keys.forEach(function (key) {
var endJSON = json[key];
endJSON.key = key
result.push(endJSON);
});
return result;
}Add two vectors togeth
function sumArrays(...arrays) {
const n = arrays.reduce((max, xs) => Math.max(max, xs.length), 0);
const result = Array.from({ length: n });
return result.map((_, i) => arrays.map(xs => xs[i] || 0).reduce((sum, x) => sum + x, 0));
}Generates a random number X digits long
function rand(digits) {
return Math.floor(Math.random() * parseInt('8' + '9'.repeat(digits - 1)) + parseInt('1' + '0'.repeat(digits - 1)));
}Checks to see if an object is equal to {}
function isEmptyObject(obj) {
for (var key in obj) {
if (obj.hasOwnProperty(key))
return false;
}
return true;
}Vanilla JS generate UID
const uid = () => {
let
d = new Date().getTime(),
d2 = ((typeof performance !== 'undefined') && performance.now && (performance.now() * 1000)) || 0;
return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => {
let r = Math.random() * 16;
if (d > 0) {
r = (d + r) % 16 | 0;
d = Math.floor(d / 16);
} else {
r = (d2 + r) % 16 | 0;
d2 = Math.floor(d2 / 16);
}
return (c == 'x' ? r : (r & 0x7 | 0x8)).toString(16);
});
};Generates a random number in range
function randRange(min, max) {
return Math.random() * (max - min) + min;
}