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/* eslint no-new-func: "off" */
export const subClassArray = (function () {
try {
// try es6 subclassing
return Function('name', 'baseClass', '_constructor', [
'baseClass = baseClass || Array',
'return {',
' [name]: class extends baseClass {',
' constructor (...args) {',
' super(...args)',
' _constructor && _constructor.apply(this, args)',
' }',
' }',
'}[name]'
].join('\n'))
} catch (e) {
// Use es5 approach
return (name, baseClass = Array, _constructor) => {
const Arr = function () {
baseClass.apply(this, arguments)
_constructor && _constructor.apply(this, arguments)
}
Arr.prototype = Object.create(baseClass.prototype)
Arr.prototype.constructor = Arr
Arr.prototype.map = function (fn) {
const arr = new Arr()
arr.push.apply(arr, Array.prototype.map.call(this, fn))
return arr
}
return Arr
}
}
})()
|
