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19 lines
570 B
19 lines
570 B
"use strict"; |
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var aFrom = require("../array/from") |
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, assign = require("./assign") |
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, value = require("./valid-value"); |
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module.exports = function (obj/*, propertyNames, options*/) { |
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var copy = Object(value(obj)), propertyNames = arguments[1], options = Object(arguments[2]); |
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if (copy !== obj && !propertyNames) return copy; |
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var result = {}; |
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if (propertyNames) { |
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aFrom(propertyNames, function (propertyName) { |
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if (options.ensure || propertyName in obj) result[propertyName] = obj[propertyName]; |
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}); |
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} else { |
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assign(result, obj); |
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} |
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return result; |
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};
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