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sojs-coder/README.md

SoJS

Professional fullstack dev since 2017

Quick access

json2array

Convert a JSON object to an array

Usage:

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;
}

SumArrays

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));
}

rand

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)));
}

isEmptyObject

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;
}

uid

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);
  });
};

randRange

Generates a random number in range

function randRange(min, max) {
  return Math.random() * (max - min) + min;
}

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