January 2018
Intermediate to advanced
332 pages
7h 36m
English
Content preview from Hands-On Data Structures and Algorithms with JavaScript
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Converting infix to postfix expressions
Putting together all the code discussed above, the final code for converting the infix expression to postfix looks like the following:
function convert(expr) { var postfix = ""; var ops = new Stack(); var operators = { "^": { priority: 4, associativity: "rtl" }, "*": { priority: 3, associativity: "ltr" }, "/": { priority: 3, associativity: "ltr" }, "+": { priority: 2, associativity: "ltr" }, "-": { priority: 2, associativity: "ltr" } }; expr = clean(expr.trim().replace(/\s+/g, "").split(/([\+\-\*\/\^\(\)])/)); if (!isBalanced(expr) { return 'error'; } expr.forEach(function(exp) { if(!isNaN(parseFloat(exp))) { postfix += exp + " "; } else if(exp === "(") { ops.push(exp); } else if(exp === ")") { while ...
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