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							- /*!
 
-  * fill-range <https://github.com/jonschlinkert/fill-range>
 
-  *
 
-  * Copyright (c) 2014-present, Jon Schlinkert.
 
-  * Licensed under the MIT License.
 
-  */
 
- 'use strict';
 
- const util = require('util');
 
- const toRegexRange = require('to-regex-range');
 
- const isObject = val => val !== null && typeof val === 'object' && !Array.isArray(val);
 
- const transform = toNumber => {
 
-   return value => toNumber === true ? Number(value) : String(value);
 
- };
 
- const isValidValue = value => {
 
-   return typeof value === 'number' || (typeof value === 'string' && value !== '');
 
- };
 
- const isNumber = num => Number.isInteger(+num);
 
- const zeros = input => {
 
-   let value = `${input}`;
 
-   let index = -1;
 
-   if (value[0] === '-') value = value.slice(1);
 
-   if (value === '0') return false;
 
-   while (value[++index] === '0');
 
-   return index > 0;
 
- };
 
- const stringify = (start, end, options) => {
 
-   if (typeof start === 'string' || typeof end === 'string') {
 
-     return true;
 
-   }
 
-   return options.stringify === true;
 
- };
 
- const pad = (input, maxLength, toNumber) => {
 
-   if (maxLength > 0) {
 
-     let dash = input[0] === '-' ? '-' : '';
 
-     if (dash) input = input.slice(1);
 
-     input = (dash + input.padStart(dash ? maxLength - 1 : maxLength, '0'));
 
-   }
 
-   if (toNumber === false) {
 
-     return String(input);
 
-   }
 
-   return input;
 
- };
 
- const toMaxLen = (input, maxLength) => {
 
-   let negative = input[0] === '-' ? '-' : '';
 
-   if (negative) {
 
-     input = input.slice(1);
 
-     maxLength--;
 
-   }
 
-   while (input.length < maxLength) input = '0' + input;
 
-   return negative ? ('-' + input) : input;
 
- };
 
- const toSequence = (parts, options, maxLen) => {
 
-   parts.negatives.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
 
-   parts.positives.sort((a, b) => a < b ? -1 : a > b ? 1 : 0);
 
-   let prefix = options.capture ? '' : '?:';
 
-   let positives = '';
 
-   let negatives = '';
 
-   let result;
 
-   if (parts.positives.length) {
 
-     positives = parts.positives.map(v => toMaxLen(String(v), maxLen)).join('|');
 
-   }
 
-   if (parts.negatives.length) {
 
-     negatives = `-(${prefix}${parts.negatives.map(v => toMaxLen(String(v), maxLen)).join('|')})`;
 
-   }
 
-   if (positives && negatives) {
 
-     result = `${positives}|${negatives}`;
 
-   } else {
 
-     result = positives || negatives;
 
-   }
 
-   if (options.wrap) {
 
-     return `(${prefix}${result})`;
 
-   }
 
-   return result;
 
- };
 
- const toRange = (a, b, isNumbers, options) => {
 
-   if (isNumbers) {
 
-     return toRegexRange(a, b, { wrap: false, ...options });
 
-   }
 
-   let start = String.fromCharCode(a);
 
-   if (a === b) return start;
 
-   let stop = String.fromCharCode(b);
 
-   return `[${start}-${stop}]`;
 
- };
 
- const toRegex = (start, end, options) => {
 
-   if (Array.isArray(start)) {
 
-     let wrap = options.wrap === true;
 
-     let prefix = options.capture ? '' : '?:';
 
-     return wrap ? `(${prefix}${start.join('|')})` : start.join('|');
 
-   }
 
-   return toRegexRange(start, end, options);
 
- };
 
- const rangeError = (...args) => {
 
-   return new RangeError('Invalid range arguments: ' + util.inspect(...args));
 
- };
 
- const invalidRange = (start, end, options) => {
 
-   if (options.strictRanges === true) throw rangeError([start, end]);
 
-   return [];
 
- };
 
- const invalidStep = (step, options) => {
 
-   if (options.strictRanges === true) {
 
-     throw new TypeError(`Expected step "${step}" to be a number`);
 
-   }
 
-   return [];
 
- };
 
- const fillNumbers = (start, end, step = 1, options = {}) => {
 
-   let a = Number(start);
 
-   let b = Number(end);
 
-   if (!Number.isInteger(a) || !Number.isInteger(b)) {
 
-     if (options.strictRanges === true) throw rangeError([start, end]);
 
-     return [];
 
-   }
 
-   // fix negative zero
 
-   if (a === 0) a = 0;
 
-   if (b === 0) b = 0;
 
-   let descending = a > b;
 
-   let startString = String(start);
 
-   let endString = String(end);
 
-   let stepString = String(step);
 
-   step = Math.max(Math.abs(step), 1);
 
-   let padded = zeros(startString) || zeros(endString) || zeros(stepString);
 
-   let maxLen = padded ? Math.max(startString.length, endString.length, stepString.length) : 0;
 
-   let toNumber = padded === false && stringify(start, end, options) === false;
 
-   let format = options.transform || transform(toNumber);
 
-   if (options.toRegex && step === 1) {
 
-     return toRange(toMaxLen(start, maxLen), toMaxLen(end, maxLen), true, options);
 
-   }
 
-   let parts = { negatives: [], positives: [] };
 
-   let push = num => parts[num < 0 ? 'negatives' : 'positives'].push(Math.abs(num));
 
-   let range = [];
 
-   let index = 0;
 
-   while (descending ? a >= b : a <= b) {
 
-     if (options.toRegex === true && step > 1) {
 
-       push(a);
 
-     } else {
 
-       range.push(pad(format(a, index), maxLen, toNumber));
 
-     }
 
-     a = descending ? a - step : a + step;
 
-     index++;
 
-   }
 
-   if (options.toRegex === true) {
 
-     return step > 1
 
-       ? toSequence(parts, options, maxLen)
 
-       : toRegex(range, null, { wrap: false, ...options });
 
-   }
 
-   return range;
 
- };
 
- const fillLetters = (start, end, step = 1, options = {}) => {
 
-   if ((!isNumber(start) && start.length > 1) || (!isNumber(end) && end.length > 1)) {
 
-     return invalidRange(start, end, options);
 
-   }
 
-   let format = options.transform || (val => String.fromCharCode(val));
 
-   let a = `${start}`.charCodeAt(0);
 
-   let b = `${end}`.charCodeAt(0);
 
-   let descending = a > b;
 
-   let min = Math.min(a, b);
 
-   let max = Math.max(a, b);
 
-   if (options.toRegex && step === 1) {
 
-     return toRange(min, max, false, options);
 
-   }
 
-   let range = [];
 
-   let index = 0;
 
-   while (descending ? a >= b : a <= b) {
 
-     range.push(format(a, index));
 
-     a = descending ? a - step : a + step;
 
-     index++;
 
-   }
 
-   if (options.toRegex === true) {
 
-     return toRegex(range, null, { wrap: false, options });
 
-   }
 
-   return range;
 
- };
 
- const fill = (start, end, step, options = {}) => {
 
-   if (end == null && isValidValue(start)) {
 
-     return [start];
 
-   }
 
-   if (!isValidValue(start) || !isValidValue(end)) {
 
-     return invalidRange(start, end, options);
 
-   }
 
-   if (typeof step === 'function') {
 
-     return fill(start, end, 1, { transform: step });
 
-   }
 
-   if (isObject(step)) {
 
-     return fill(start, end, 0, step);
 
-   }
 
-   let opts = { ...options };
 
-   if (opts.capture === true) opts.wrap = true;
 
-   step = step || opts.step || 1;
 
-   if (!isNumber(step)) {
 
-     if (step != null && !isObject(step)) return invalidStep(step, opts);
 
-     return fill(start, end, 1, step);
 
-   }
 
-   if (isNumber(start) && isNumber(end)) {
 
-     return fillNumbers(start, end, step, opts);
 
-   }
 
-   return fillLetters(start, end, Math.max(Math.abs(step), 1), opts);
 
- };
 
- module.exports = fill;
 
 
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