@bygdle/expr-parser
v0.9.7
Published
Parses and evaluates mathematical expressions with custom functions and variables.
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Readme
Expr parser
Parses and evaluates mathematical expressions with custom functions and variables.
https://github.com/NiuWeb/expr-parser
Installation
npm install @bygdle/expr-parser
Usage example
import { Parser } from "@bygdle/expr-parser"
const parser = new Parser({
functions: {
log: { // a custom function log
arguments: 1,
evaluate: ([arg]) => {
return Math.log(arg)
}
}
},
variables: {
pi: Math.PI
}
})
const expr = parser.parse("log(pi) + 1")
console.log(expr.evaluate())
parset.setVar("pi", 3)
console.log(expr.evaluate())