Validator for a string expression that will allow arithmetic expressions like (),+,-,*,/,min(),max(),avg()

JavaScript
1

I need a help in writing a validator in javascript or JQuery for a string expression that will allow arithmetic expressions like (),+,-,*,/,min(),max(),avg().
In the string, min(),max(),avg() should allow only two arguments.
Sample string expression to validate :
(x+y+max(min(x,y),z)+avg(x,y)*z/y)

2

Well first question is… why.

Second question is what have you done so far?

1 Like
3

I concur with @m_hutley. The RegExp for this would be pretty complex.

V/r,

^ _ ^

4

You don’t need a regex for this. Regex can solve a lot of problems, but most problems that can be solved using regex can be better solved another way.

In this case what you’d need is a parser and a tokenizer to cut the expression into bits and then evaluate the different parts.

1 Like
5

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