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{"@context":"https://schema.org","@type":"Code","url":"https://leetcodejavascript.com/solutions/evaluate-reverse-polish-notation","name":"#150 - Evaluate Reverse Polish Notation - LeetCode JavaScript Solutions","description":"You are given an array of strings tokens that represents an arithmetic expression in a Reverse Polish Notation. Evaluate the expression. Ret...","programmingLanguage":"JavaScript","codeRepository":"https://github.com/JoshCrozier/leetcode-javascript","codeSampleType":"JavaScript","text":"/**\n * @param {string[]} tokens\n * @return {number}\n */\nvar evalRPN = function(tokens) {\n const stack = [];\n const operators = {\n '+': (a, b) => a + b,\n '-': (a, b) => a - b,\n '*': (a, b) => a * b,\n '/': (a, b) => a / b >= 0 ? Math.floor(a / b) : Math.ceil(a / b),\n };\n\n tokens.forEach(token => {\n if (operators[token]) {\n const item = stack.pop();\n stack.push(operators[token](stack.pop(), item));\n } else {\n stack.push(Number(token));\n }\n });\n\n return stack.pop();\n};","keywords":"LeetCode 150, #150 - Evaluate Reverse Polish Notation, Medium, JavaScript solution","learningResourceType":"Code","isAccessibleForFree":true,"educationalLevel":"intermediate","interactivityType":"mixed"}