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update RPN solver

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This commit is contained in:
Rohit Tanwar
2018-01-01 20:59:54 +05:30
parent 864ddd4549
commit ff9a4ff546
1 changed files with 17 additions and 6 deletions
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23
snippets/RPNSolver.md
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@ -8,14 +8,25 @@ const RPNSolver = RPN => {
let stack = [];
let solve = RPN.replace(/\^/g,'**').split(/\s+/g);
solve.forEach(symbol => {
isNumeric(symbol) ? stack.push(symbol) :
isOperator(symbol) ?
(a = stack.pop(),
b = stack.pop(),
stack.push(eval(a + symbol + b))) : Console.log('Wrong RPN')
if(isNumeric(symbol)) {stack.push(symbol)}
else if (isOperator(symbol)){
a = stack.pop();
b = stack.pop();
if(symbol === "+") {
stack.push(parseFloat(a) + parseFloat(b));
} else if(symbol === "-") {
stack.push(parseFloat(b) - parseFloat(a));
} else if(symbol === "*") {
stack.push(parseFloat(a) * parseFloat(b));
} else if(symbol === "/") {
stack.push(parseFloat(b) / parseFloat(a));
} else if(symbol === "**") {
stack.push(parseFloat(a) ** parseFloat(b));
}
} else { console.log('Wrong RPN')}
}
)
return stack.pop()
return stack.length === 1 ? stack.pop : console.log("error")
}
```