Multi bracket validation

.eslintrc.json

@@ -0,0 +1,27 @@
+{
+    "env": {
+      "browser": true,
+      "node": true,
+      "commonjs": true,
+      "jest": true,
+      "es6": true
+    },
+    "globals": {
+      "err": true,
+      "req": true,
+      "res": true,
+      "next": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+      "sourceType": "module"
+    },
+    "rules": {
+      "no-console": "off",
+      "indent": [ "error", 2 ],
+      "quotes": ["error", "single", { "allowTemplateLiterals": true }],
+      "comma-dangle": ["error", "always-multiline"],
+      "semi": [ "error", "always" ]
+    }
+  }
+

README.md

@@ -1,6 +1,13 @@
-# Table of Contents
-[1- code challange class 2 array shift ](https://github.com/Goorob-401-advanced-javascript/data-structures-and-algorithms/pull/3)
+# Multi-bracket Validation 
+## Challenge summary 
+Multi-bracket Validation 
+## Challenge Description
 
-[2- code challange class 3 array binary search ](https://github.com/Goorob-401-advanced-javascript/data-structures-and-algorithms/pull/2)
+create function taht take a string as its only argument, and should return a boolean representing whether or not the brackets in the string are balanced. There are 3 types of brackets:
+Round Brackets : ()
+Square Brackets : []
+Curly Brackets : {}
 
-[
+## Solution
+
+![UML]

challanges/multi-bracket-validation/multi-bracket-validation.js

@@ -0,0 +1,30 @@
+'use strict ' ; 
+// used the this website to solve this problem : https://medium.com/@paulrohan/parenthesis-matching-problem-in-javascript-the-hacking-school-hyd-7d7708278911
+let multiBracketValidation = (str) => {
+  let stack = [];
+
+  let bracketOpener = {
+    '{': '}',
+    '[': ']',
+    '(': ')',
+  };
+  let closed = {
+    '}': true,
+    ']': true,
+    ')': true,
+  };
+  for (let i = 0; i < str.length; i++) {
+    let char = str[i];
+    if (bracketOpener[char]) {
+      stack.push(char);
+    } else if (closed[char]) {
+      if (bracketOpener[stack.pop()] !== char) return false;
+    }
+  }
+  return stack.length === 0;
+}; 
+module.exports =multiBracketValidation ;
+// let test= multiBracketValidation('{[()]');
+// let test= multiBracketValidation('{[()]}');
+// console.log(test);
+

challanges/multi-bracket-validation/multi-bracket-validation.test.js

@@ -0,0 +1,12 @@
+'use strict';
+const multiBracketValidator = require('./multi-bracket-validation.js');
+describe(' test multi bracket validator function ' , ()=>{
+  let str1 = '{([])}';
+  let str2 = '([{])';
+  it('return true if all brackets are matched', ()=>{
+    expect(multiBracketValidator(str1)).toBeTruthy(); 
+  });
+  it('return false if the brackets aren\'t matched', ()=>{
+    expect(multiBracketValidator(str2)).toBeFalsy(); 
+  });
+});