Changes in README

Author: Hetarth02

.gitignore

@@ -1,2 +1,4 @@
 # js-array-helpers
+![npm (scoped)](https://img.shields.io/npm/v/@hetarth02/js-array-helpers?style=for-the-badge)
+
 Array Helper functions for your quick use.

README.md

@@ -0,0 +1,68 @@
+function _throw() {
+    throw new TypeError("Must be a valid array!");
+}
+
+function is_array(arr) {
+    return Array.isArray(arr) ? true : _throw();
+}
+
+function head(arr) {
+    is_array(arr);
+    return arr[0];
+}
+
+function tail(arr) {
+    is_array(arr);
+    let element = arr.pop();
+    arr.push(element);
+    return element;
+}
+
+function in_array(arr, value) {
+    is_array(arr);
+    return arr.includes(value);
+}
+
+function array_chunk(arr, chunk_size) {
+    is_array(arr);
+    if (typeof chunk_size != "number") {
+        throw new TypeError("chunk_size should be a integer!");
+    }
+
+    let length = arr.length;
+    chunk_size = Math.abs(Math.round(chunk_size));
+
+    if (chunk_size > length || [0, null, NaN].includes(chunk_size)) {
+        return arr;
+    } else {
+        let modified_array = [];
+        for (let index = 0; index < length; index += chunk_size) {
+            modified_array.push(arr.slice(index, index + chunk_size));
+        }
+        arr = modified_array;
+        return arr;
+    }
+}
+
+function array_filter(arr) {
+    is_array(arr);
+    arr = arr.filter(function (e) {
+        return e === 0 || e;
+    });
+    return arr;
+}
+
+function array_frequency(arr) {
+    is_array(arr);
+    let freq_obj = {};
+    arr.forEach((value) => {
+        if (value in freq_obj) {
+            freq_obj[value] += 1;
+        } else {
+            freq_obj[value] = 1;
+        }
+    });
+    return freq_obj;
+}
+
+export { is_array, head, tail, in_array, array_filter, array_chunk, array_frequency };

index.js

@@ -0,0 +1,32 @@
+{
+    "name": "@hetarth02/js-array-helpers",
+    "version": "1.0.0",
+    "description": "Array Helper functions.",
+    "type": "module",
+    "main": "index.js",
+    "exports": {
+        ".": {
+            "require": "./dist/helpers.js",
+            "default": "./dist/helpers.module.js"
+        }
+    },
+    "license": "MIT",
+    "author": {
+        "name": "Hetarth Shah",
+        "url": "https://hetarth.tech/"
+    },
+    "homepage": "https://github.com/Hetarth02/js-array-helpers#README",
+    "repository": {
+        "type": "git",
+        "url": "https://github.com/hetarth02/js-array-helpers.git"
+    },
+    "bugs": {
+        "url": "https://github.com/hetarth02/js-array-helpers/issues"
+    },
+    "keywords": [
+        "array helpers",
+        "js array helpers",
+        "package",
+        "helpers"
+    ]
+}