58 lines
1.8 KiB
JavaScript
58 lines
1.8 KiB
JavaScript
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import _includes from "./_includes.js";
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import _map from "./_map.js";
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import _quote from "./_quote.js";
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import _toISOString from "./_toISOString.js";
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import keys from "../keys.js";
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import reject from "../reject.js";
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export default function _toString(x, seen) {
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var recur = function recur(y) {
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var xs = seen.concat([x]);
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return _includes(y, xs) ? '<Circular>' : _toString(y, xs);
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}; // mapPairs :: (Object, [String]) -> [String]
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var mapPairs = function (obj, keys) {
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return _map(function (k) {
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return _quote(k) + ': ' + recur(obj[k]);
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}, keys.slice().sort());
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};
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switch (Object.prototype.toString.call(x)) {
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case '[object Arguments]':
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return '(function() { return arguments; }(' + _map(recur, x).join(', ') + '))';
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case '[object Array]':
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return '[' + _map(recur, x).concat(mapPairs(x, reject(function (k) {
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return /^\d+$/.test(k);
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}, keys(x)))).join(', ') + ']';
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case '[object Boolean]':
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return typeof x === 'object' ? 'new Boolean(' + recur(x.valueOf()) + ')' : x.toString();
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case '[object Date]':
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return 'new Date(' + (isNaN(x.valueOf()) ? recur(NaN) : _quote(_toISOString(x))) + ')';
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case '[object Null]':
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return 'null';
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case '[object Number]':
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return typeof x === 'object' ? 'new Number(' + recur(x.valueOf()) + ')' : 1 / x === -Infinity ? '-0' : x.toString(10);
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case '[object String]':
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return typeof x === 'object' ? 'new String(' + recur(x.valueOf()) + ')' : _quote(x);
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case '[object Undefined]':
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return 'undefined';
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default:
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if (typeof x.toString === 'function') {
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var repr = x.toString();
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if (repr !== '[object Object]') {
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return repr;
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}
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}
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return '{' + mapPairs(x, keys(x)).join(', ') + '}';
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}
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}
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