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rOACCT/node_modules/qs/lib/utils.js
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utils.js
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			'use strict';

			var formats = require('./formats');

			var has = Object.prototype.hasOwnProperty;
			var isArray = Array.isArray;

			var hexTable = (function () {
			var array = [];
			for (var i = 0; i < 256; ++i) {
			array.push('%' + ((i < 16 ? '0' : '') + i.toString(16)).toUpperCase());
			}

			return array;
			}());

			var compactQueue = function compactQueue(queue) {
			while (queue.length > 1) {
			var item = queue.pop();
			var obj = item.obj[item.prop];

			if (isArray(obj)) {
			var compacted = [];

			for (var j = 0; j < obj.length; ++j) {
			if (typeof obj[j] !== 'undefined') {
			compacted.push(obj[j]);
			}
			}

			item.obj[item.prop] = compacted;
			}
			}
			};

			var arrayToObject = function arrayToObject(source, options) {
			var obj = options && options.plainObjects ? Object.create(null) : {};
			for (var i = 0; i < source.length; ++i) {
			if (typeof source[i] !== 'undefined') {
			obj[i] = source[i];
			}
			}

			return obj;
			};

			var merge = function merge(target, source, options) {
			/* eslint no-param-reassign: 0 */
			if (!source) {
			return target;
			}

			if (typeof source !== 'object') {
			if (isArray(target)) {
			target.push(source);
			} else if (target && typeof target === 'object') {
			if ((options && (options.plainObjects \|\| options.allowPrototypes)) \|\| !has.call(Object.prototype, source)) {
			target[source] = true;
			}
			} else {
			return [target, source];
			}

			return target;
			}

			if (!target \|\| typeof target !== 'object') {
			return [target].concat(source);
			}

			var mergeTarget = target;
			if (isArray(target) && !isArray(source)) {
			mergeTarget = arrayToObject(target, options);
			}

			if (isArray(target) && isArray(source)) {
			source.forEach(function (item, i) {
			if (has.call(target, i)) {
			var targetItem = target[i];
			if (targetItem && typeof targetItem === 'object' && item && typeof item === 'object') {
			target[i] = merge(targetItem, item, options);
			} else {
			target.push(item);
			}
			} else {
			target[i] = item;
			}
			});
			return target;
			}

			return Object.keys(source).reduce(function (acc, key) {
			var value = source[key];

			if (has.call(acc, key)) {
			acc[key] = merge(acc[key], value, options);
			} else {
			acc[key] = value;
			}
			return acc;
			}, mergeTarget);
			};

			var assign = function assignSingleSource(target, source) {
			return Object.keys(source).reduce(function (acc, key) {
			acc[key] = source[key];
			return acc;
			}, target);
			};

			var decode = function (str, decoder, charset) {
			var strWithoutPlus = str.replace(/\+/g, ' ');
			if (charset === 'iso-8859-1') {
			// unescape never throws, no try...catch needed:
			return strWithoutPlus.replace(/%[0-9a-f]{2}/gi, unescape);
			}
			// utf-8
			try {
			return decodeURIComponent(strWithoutPlus);
			} catch (e) {
			return strWithoutPlus;
			}
			};

			var encode = function encode(str, defaultEncoder, charset, kind, format) {
			// This code was originally written by Brian White (mscdex) for the io.js core querystring library.
			// It has been adapted here for stricter adherence to RFC 3986
			if (str.length === 0) {
			return str;
			}

			var string = str;
			if (typeof str === 'symbol') {
			string = Symbol.prototype.toString.call(str);
			} else if (typeof str !== 'string') {
			string = String(str);
			}

			if (charset === 'iso-8859-1') {
			return escape(string).replace(/%u[0-9a-f]{4}/gi, function ($0) {
			return '%26%23' + parseInt($0.slice(2), 16) + '%3B';
			});
			}

			var out = '';
			for (var i = 0; i < string.length; ++i) {
			var c = string.charCodeAt(i);

			if (
			c === 0x2D // -
			\|\| c === 0x2E // .
			\|\| c === 0x5F // _
			\|\| c === 0x7E // ~
			\|\| (c >= 0x30 && c <= 0x39) // 0-9
			\|\| (c >= 0x41 && c <= 0x5A) // a-z
			\|\| (c >= 0x61 && c <= 0x7A) // A-Z
			\|\| (format === formats.RFC1738 && (c === 0x28 \|\| c === 0x29)) // ( )
			) {
			out += string.charAt(i);
			continue;
			}

			if (c < 0x80) {
			out = out + hexTable[c];
			continue;
			}

			if (c < 0x800) {
			out = out + (hexTable[0xC0 \| (c >> 6)] + hexTable[0x80 \| (c & 0x3F)]);
			continue;
			}

			if (c < 0xD800 \|\| c >= 0xE000) {
			out = out + (hexTable[0xE0 \| (c >> 12)] + hexTable[0x80 \| ((c >> 6) & 0x3F)] + hexTable[0x80 \| (c & 0x3F)]);
			continue;
			}

			i += 1;
			c = 0x10000 + (((c & 0x3FF) << 10) \| (string.charCodeAt(i) & 0x3FF));
			/* eslint operator-linebreak: [2, "before"] */
			out += hexTable[0xF0 \| (c >> 18)]
			+ hexTable[0x80 \| ((c >> 12) & 0x3F)]
			+ hexTable[0x80 \| ((c >> 6) & 0x3F)]
			+ hexTable[0x80 \| (c & 0x3F)];
			}

			return out;
			};

			var compact = function compact(value) {
			var queue = [{ obj: { o: value }, prop: 'o' }];
			var refs = [];

			for (var i = 0; i < queue.length; ++i) {
			var item = queue[i];
			var obj = item.obj[item.prop];

			var keys = Object.keys(obj);
			for (var j = 0; j < keys.length; ++j) {
			var key = keys[j];
			var val = obj[key];
			if (typeof val === 'object' && val !== null && refs.indexOf(val) === -1) {
			queue.push({ obj: obj, prop: key });
			refs.push(val);
			}
			}
			}

			compactQueue(queue);

			return value;
			};

			var isRegExp = function isRegExp(obj) {
			return Object.prototype.toString.call(obj) === '[object RegExp]';
			};

			var isBuffer = function isBuffer(obj) {
			if (!obj \|\| typeof obj !== 'object') {
			return false;
			}

			return !!(obj.constructor && obj.constructor.isBuffer && obj.constructor.isBuffer(obj));
			};

			var combine = function combine(a, b) {
			return [].concat(a, b);
			};

			var maybeMap = function maybeMap(val, fn) {
			if (isArray(val)) {
			var mapped = [];
			for (var i = 0; i < val.length; i += 1) {
			mapped.push(fn(val[i]));
			}
			return mapped;
			}
			return fn(val);
			};

			module.exports = {
			arrayToObject: arrayToObject,
			assign: assign,
			combine: combine,
			compact: compact,
			decode: decode,
			encode: encode,
			isBuffer: isBuffer,
			isRegExp: isRegExp,
			maybeMap: maybeMap,
			merge: merge
			};