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clone method #102

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blond opened this issue Apr 14, 2017 · 1 comment

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blond commented Apr 14, 2017

const BemEntityName = require('@bem/entity-name');

const buttonName = new BemEntityName({ block: 'button' });

buttonName.clone(); // BemEntityName({ block: 'button' })

const mutant = buttonName.clone({ elem: 'text' }); // BemEntityName({ block: 'button', elem: 'text' })

mutant.clone({ elem: null }); // BemEntityName({ block: 'button' })

blond mentioned this issue

Method for mutating bem-entities #87

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blond commented Apr 15, 2017

Simple clone without parameters looks strange for immutable objects. Especially if we to implement optimization for create same instances (#103).

const BemEntityName = require('@bem/entity-name');

const name = new BemEntityName({ block: 'button' });
const clone = buttonName.clone();

name === clone // WTF ???

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