nv-bool-true-false-undef

nv-bool-true-false-undef
===============
- nv-bool-true-false-undef
- simple util of some bool operation about true /false/ undefined

install
=======
- npm install nv-bool-true-false-undef

usage
=====

const {calc,trans} = require("nv-bool-true-false-undef")

#unary:

not(undefined) === undefined
not(true) === false
not(false) === true

#binop:

##and

* | T | F | U
---------------
T | T | F | U
---------------
F | F | F | F
---------------
U | U | F | U
---------------

##or

+ | T | F | U
---------------
T | T | T | T
---------------
F | T | F | U
---------------
U | T | U | U
---------------

example
-------

$3

#### un/binop

> calc._not1(undefined)
undefined
> calc._and2(undefined,true)
undefined
> calc._and2(undefined,false)
false
> calc._or2(undefined,true)
true
> calc._or2(undefined,false)
undefined
>

#### prefix-op

> calc.or([true,undefined,false])
true
> calc.or([false,undefined,false])
undefined

$3

> trans.translate(1)
true
> trans.translate('t')
true
> trans.translate('true')
true
> trans.translate('tru')
true
> trans.translate('y')
true
> trans.translate('yes')
true
> trans.translate('是')
true
> trans.translate('真')
true

API
====

calc
-----

$3

const _not1 = (o,empty=undefined) =>(o===empty)?o:!o;
const _and2 = (l,r,empty=undefined) => {
const _or2 = (l,r,empty=undefined) => {

$3

const not = (ary,empty=undefined) => _not1(ary[0]);
const and = (ary,empty=undefined) => {
const or = (ary,empty=undefined) => {

trans
-----

const is_true_lower_str = (o) =>(
const is_true_str = (o) => is_true_lower_str(o.toLowerCase());
const is_true_val = (o) => (o===true || o===1);
const is_true = (o)=> is_true_val(o) || is_true_str(o);
const is_false_lower_str = (o) => (
const is_false_val = (o) => (o===false || o===0);
const is_false = (o)=> is_false_val(o) || is_false_str(o);
const is_undef_lower_str = (o) => (
const is_undef_val = (o) => (o===undefined || o===-1);
const is_undef = (o)=> is_false_val(o) || is_false_str(o);
const translate = (o) => {

LICENSE
=======
- ISC