mirror of https://github.com/codefeathers/fuse
Muthu Kumar
7 years ago
3 changed files with 73 additions and 8 deletions
@ -1,21 +1,67 @@ |
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'use strict'; |
'use strict'; |
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const isIterable = val => typeof val === "object" && Symbol.iterator in val; |
class SelectValue { |
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class Select { |
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constructor(value, resolve) { |
constructor(value, resolve) { |
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this.value = value; |
this.value = value; |
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this.iterable = isIterable(value); |
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if (resolve) this.resolve = resolve; |
if (resolve) this.resolve = resolve; |
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} |
} |
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} |
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SelectValue.prototype.resolve = () => null; |
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class SelectIterable { |
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constructor(values, tests) { |
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this.values = values |
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.map(x => x instanceof SelectValue |
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? x |
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: new SelectValue(x) |
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); |
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this.tests = tests; |
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} |
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for(test, consequent) { |
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const self = this; |
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return new SelectIterable( |
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self.values, |
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[ ...self.tests, { test, consequent } ] |
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); |
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} |
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} |
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/* eslint-disable-next-line func-names */ |
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SelectIterable.prototype.resolve = function (...args) { |
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const self = this; |
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return self.values.map(item => { |
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const resolve = self |
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.tests |
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/* eslint-disable-next-line */ |
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.find(x => { |
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return x.test(item.value) |
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? x.consequent |
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: null; |
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}); |
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return resolve |
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? resolve.consequent(...args, self.value) |
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: () => null; |
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}); |
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}; |
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class Select extends SelectValue { |
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constructor(value, resolve) { |
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super(value, resolve); |
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this.iterable = typeof value === "object" && Symbol.iterator in value; |
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} |
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for(test, consequent) { |
for(test, consequent) { |
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if (this.iterable) { |
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return new SelectIterable( |
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Array.from(this.value), |
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[ { test, consequent } ], |
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); |
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} |
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if (test(this.value)) return new Select(this.value, consequent); |
if (test(this.value)) return new Select(this.value, consequent); |
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if (this.resolve) return this; |
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return this; |
return this; |
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} |
} |
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} |
} |
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Select.prototype.resolve = () => null; |
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module.exports = Select; |
module.exports = Select; |
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@ -0,0 +1,20 @@ |
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'use strict'; |
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const Select = require('../Select'); |
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/* global describe it expect */ |
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describe("Select", () => { |
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it("Should return array [ 'Is 10', 'Greater than 10', 'Lesser than 10' ]", |
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() => { |
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const a = [ 10, 20, 0 ]; |
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const result = new Select(a) |
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.for(x => x > 10, () => 'Greater than 10') |
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.for(x => x < 10, () => 'Lesser than 10') |
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.for(x => x === 10, () => `Is 10`); |
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expect(result.resolve()) |
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.toEqual([ 'Is 10', 'Greater than 10', 'Lesser than 10' ]); |
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}); |
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}); |
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