65 lines
1.4 KiB
JavaScript
65 lines
1.4 KiB
JavaScript
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'use strict';
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function _cycler(items) {
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var index = -1;
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return {
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current: null,
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reset: function reset() {
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index = -1;
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this.current = null;
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},
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next: function next() {
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index++;
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if (index >= items.length) {
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index = 0;
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}
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this.current = items[index];
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return this.current;
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}
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};
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}
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function _joiner(sep) {
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sep = sep || ',';
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var first = true;
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return function () {
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var val = first ? '' : sep;
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first = false;
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return val;
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};
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}
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// Making this a function instead so it returns a new object
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// each time it's called. That way, if something like an environment
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// uses it, they will each have their own copy.
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function globals() {
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return {
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range: function range(start, stop, step) {
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if (typeof stop === 'undefined') {
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stop = start;
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start = 0;
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step = 1;
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} else if (!step) {
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step = 1;
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}
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var arr = [];
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if (step > 0) {
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for (var i = start; i < stop; i += step) {
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arr.push(i);
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}
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} else {
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for (var _i = start; _i > stop; _i += step) {
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// eslint-disable-line for-direction
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arr.push(_i);
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}
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}
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return arr;
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},
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cycler: function cycler() {
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return _cycler(Array.prototype.slice.call(arguments));
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},
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joiner: function joiner(sep) {
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return _joiner(sep);
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}
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};
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}
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module.exports = globals;
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