bexp
v1.0.3
Published
Boolean, Logical, And OR NOT Expression Parser
Downloads
555
Maintainers
Readme
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 ofand
.
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 ofand
.
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)