bexp

Boolean, Logical, And OR NOT Expression Parser

Usage no npm install needed!

<script type="module">
  import bexp from 'https://cdn.skypack.dev/bexp';
</script>

README

Boolean Expression Parser (bexp)

$ npm install bexp
const BexpParser = require("bexp");

bexpParser = new BexpParser("a and b or c but !d");
BexpParser.test("a")
BexpParser.test(["a","b"])

Supported expressions example

  • a and b or c but !d
  • a And b Or c But !d
  • a AND b OR c BUT !d
  • a + b OR c -d
  • a + b || c -d
  • a - b
  • a && b || c !d
  • a && b || c !d

Note:

  • when operand is not given before not then it is considered as AND
  • but is an alias of and.

Boolean Expressions

const BexpParser = require("bexp");

bexpParser = new BexpParser();
BexpParser.evaluate("True and false or true but !N")

Supported expressions example

  • True and false or true but !N
  • True And false Or true But !N
  • True AND false OR true BUT not N
  • True + false OR true -N
  • True + false || true -N
  • Yes && false || true !N
  • Y && false || true !N

Note:

  • when operand is not given before not then it is considered as AND
  • but is an alias of and.

Applications

Use it to evaluate which functional test has to be run when tag expression is given

  • @focus
  • @All but not @Ignore

Or to build advanced mongodb search queries

  • (nodejs or reactjs or angularjs )
  • !java
  • (sql or mongodb) and (java or nodejs)