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typesetting/pitfall/pdfkit/node_modules/object-keys/isArguments.js

17 lines
437 B
JavaScript

var toString = Object.prototype.toString;
module.exports = function isArguments(value) {
var str = toString.call(value);
var isArguments = str === '[object Arguments]';
if (!isArguments) {
isArguments = str !== '[object Array]'
&& value !== null
&& typeof value === 'object'
&& typeof value.length === 'number'
&& value.length >= 0
&& toString.call(value.callee) === '[object Function]';
}
return isArguments;
};