Boolean Expression Parser (bexp)

$ npm install bexp

const BexpParser = require("bexp");
const options = { allowMathOperators : true};
const bexpParser = new BexpParser("a and b or c but !d", options);
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");

const 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)