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Merge pull request #466 from kriadmin/patch-4

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Add the list of supported operator
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Stefan Feješ
2018-01-03 07:10:33 +01:00
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parent 226ed595a9 18981b54af
commit 2b4b4c8880
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snippets/solveRPN.md
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### solveRPN ### solveRPN
Solves the given mathematical expression in [reverse polish notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation). Solves the given mathematical expression in [reverse polish notation](https://en.wikipedia.org/wiki/Reverse_Polish_notation).
Throws appropriate errors if there are unrecognized symbols or the expression is wrong. Throws appropriate errors if there are unrecognized symbols or the expression is wrong. The valid operators are :- `+`,`-`,`*`,`/`,`^`,`**` (`^`&`**` are the exponential symbols and are same). This snippet does not supports any unary operators.
Use a dictionary, `OPERATORS` to specify each operator's matching mathematical operation. Use a dictionary, `OPERATORS` to specify each operator's matching mathematical operation.
Use `String.replace()` with a regular expression to replace `^` with `**`, `String.split()` to tokenize the string and `Array.filter()` to remove empty tokens. Use `String.replace()` with a regular expression to replace `^` with `**`, `String.split()` to tokenize the string and `Array.filter()` to remove empty tokens.