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- 'use strict';
- function preserveCamelCase(str) {
- var isLastCharLower = false;
- for (var i = 0; i < str.length; i++) {
- var c = str.charAt(i);
- if (isLastCharLower && (/[a-zA-Z]/).test(c) && c.toUpperCase() === c) {
- str = str.substr(0, i) + '-' + str.substr(i);
- isLastCharLower = false;
- i++;
- } else {
- isLastCharLower = (c.toLowerCase() === c);
- }
- }
- return str;
- }
- module.exports = function () {
- var str = [].map.call(arguments, function (str) {
- return str.trim();
- }).filter(function (str) {
- return str.length;
- }).join('-');
- if (!str.length) {
- return '';
- }
- if (str.length === 1) {
- return str.toLowerCase();
- }
- if (!(/[_.\- ]+/).test(str)) {
- if (str === str.toUpperCase()) {
- return str.toLowerCase();
- }
- if (str[0] !== str[0].toLowerCase()) {
- return str[0].toLowerCase() + str.slice(1);
- }
- return str;
- }
- str = preserveCamelCase(str);
- return str
- .replace(/^[_.\- ]+/, '')
- .toLowerCase()
- .replace(/[_.\- ]+(\w|$)/g, function (m, p1) {
- return p1.toUpperCase();
- });
- };
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