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node_modules/fill-range/index.js

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+/*!
+ * fill-range <https://github.com/jonschlinkert/fill-range>
+ *
+ * Copyright (c) 2014-2015, 2017, Jon Schlinkert.
+ * Released under the MIT License.
+ */
+
+'use strict';
+
+var util = require('util');
+var isNumber = require('is-number');
+var extend = require('extend-shallow');
+var repeat = require('repeat-string');
+var toRegex = require('to-regex-range');
+
+/**
+ * Return a range of numbers or letters.
+ *
+ * @param  {String} `start` Start of the range
+ * @param  {String} `stop` End of the range
+ * @param  {String} `step` Increment or decrement to use.
+ * @param  {Function} `fn` Custom function to modify each element in the range.
+ * @return {Array}
+ */
+
+function fillRange(start, stop, step, options) {
+  if (typeof start === 'undefined') {
+    return [];
+  }
+
+  if (typeof stop === 'undefined' || start === stop) {
+    // special case, for handling negative zero
+    var isString = typeof start === 'string';
+    if (isNumber(start) && !toNumber(start)) {
+      return [isString ? '0' : 0];
+    }
+    return [start];
+  }
+
+  if (typeof step !== 'number' && typeof step !== 'string') {
+    options = step;
+    step = undefined;
+  }
+
+  if (typeof options === 'function') {
+    options = { transform: options };
+  }
+
+  var opts = extend({step: step}, options);
+  if (opts.step && !isValidNumber(opts.step)) {
+    if (opts.strictRanges === true) {
+      throw new TypeError('expected options.step to be a number');
+    }
+    return [];
+  }
+
+  opts.isNumber = isValidNumber(start) && isValidNumber(stop);
+  if (!opts.isNumber && !isValid(start, stop)) {
+    if (opts.strictRanges === true) {
+      throw new RangeError('invalid range arguments: ' + util.inspect([start, stop]));
+    }
+    return [];
+  }
+
+  opts.isPadded = isPadded(start) || isPadded(stop);
+  opts.toString = opts.stringify
+    || typeof opts.step === 'string'
+    || typeof start === 'string'
+    || typeof stop === 'string'
+    || !opts.isNumber;
+
+  if (opts.isPadded) {
+    opts.maxLength = Math.max(String(start).length, String(stop).length);
+  }
+
+  // support legacy minimatch/fill-range options
+  if (typeof opts.optimize === 'boolean') opts.toRegex = opts.optimize;
+  if (typeof opts.makeRe === 'boolean') opts.toRegex = opts.makeRe;
+  return expand(start, stop, opts);
+}
+
+function expand(start, stop, options) {
+  var a = options.isNumber ? toNumber(start) : start.charCodeAt(0);
+  var b = options.isNumber ? toNumber(stop) : stop.charCodeAt(0);
+
+  var step = Math.abs(toNumber(options.step)) || 1;
+  if (options.toRegex && step === 1) {
+    return toRange(a, b, start, stop, options);
+  }
+
+  var zero = {greater: [], lesser: []};
+  var asc = a < b;
+  var arr = new Array(Math.round((asc ? b - a : a - b) / step));
+  var idx = 0;
+
+  while (asc ? a <= b : a >= b) {
+    var val = options.isNumber ? a : String.fromCharCode(a);
+    if (options.toRegex && (val >= 0 || !options.isNumber)) {
+      zero.greater.push(val);
+    } else {
+      zero.lesser.push(Math.abs(val));
+    }
+
+    if (options.isPadded) {
+      val = zeros(val, options);
+    }
+
+    if (options.toString) {
+      val = String(val);
+    }
+
+    if (typeof options.transform === 'function') {
+      arr[idx++] = options.transform(val, a, b, step, idx, arr, options);
+    } else {
+      arr[idx++] = val;
+    }
+
+    if (asc) {
+      a += step;
+    } else {
+      a -= step;
+    }
+  }
+
+  if (options.toRegex === true) {
+    return toSequence(arr, zero, options);
+  }
+  return arr;
+}
+
+function toRange(a, b, start, stop, options) {
+  if (options.isPadded) {
+    return toRegex(start, stop, options);
+  }
+
+  if (options.isNumber) {
+    return toRegex(Math.min(a, b), Math.max(a, b), options);
+  }
+
+  var start = String.fromCharCode(Math.min(a, b));
+  var stop = String.fromCharCode(Math.max(a, b));
+  return '[' + start + '-' + stop + ']';
+}
+
+function toSequence(arr, zeros, options) {
+  var greater = '', lesser = '';
+  if (zeros.greater.length) {
+    greater = zeros.greater.join('|');
+  }
+  if (zeros.lesser.length) {
+    lesser = '-(' + zeros.lesser.join('|') + ')';
+  }
+  var res = greater && lesser
+    ? greater + '|' + lesser
+    : greater || lesser;
+
+  if (options.capture) {
+    return '(' + res + ')';
+  }
+  return res;
+}
+
+function zeros(val, options) {
+  if (options.isPadded) {
+    var str = String(val);
+    var len = str.length;
+    var dash = '';
+    if (str.charAt(0) === '-') {
+      dash = '-';
+      str = str.slice(1);
+    }
+    var diff = options.maxLength - len;
+    var pad = repeat('0', diff);
+    val = (dash + pad + str);
+  }
+  if (options.stringify) {
+    return String(val);
+  }
+  return val;
+}
+
+function toNumber(val) {
+  return Number(val) || 0;
+}
+
+function isPadded(str) {
+  return /^-?0\d/.test(str);
+}
+
+function isValid(min, max) {
+  return (isValidNumber(min) || isValidLetter(min))
+      && (isValidNumber(max) || isValidLetter(max));
+}
+
+function isValidLetter(ch) {
+  return typeof ch === 'string' && ch.length === 1 && /^\w+$/.test(ch);
+}
+
+function isValidNumber(n) {
+  return isNumber(n) && !/\./.test(n);
+}
+
+/**
+ * Expose `fillRange`
+ * @type {Function}
+ */
+
+module.exports = fillRange;