| 1 | ;
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| 2 |
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| 3 | var utils = require('./utils');
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| 4 |
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| 5 | /**
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| 6 | * Return the product of `a` plus `b`.
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| 7 | *
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| 8 | * ```js
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| 9 | * <%= add(1, 2) %>
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| 10 | * //=> '3'
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| 11 | * ```
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| 12 | *
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| 13 | * @param {Number} `a`
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| 14 | * @param {Number} `b`
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| 15 | * @api public
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| 16 | */
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| 17 |
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| 18 | exports.add = function add(a, b) {
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| 19 | return a + b;
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| 20 | };
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| 21 |
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| 22 | /**
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| 23 | * Subtract `b` from `a`.
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| 24 | *
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| 25 | * ```js
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| 26 | * <%= subtract(5, 2) %>
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| 27 | * //=> '3'
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| 28 | * ```
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| 29 | *
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| 30 | * @param {Number} `a`
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| 31 | * @param {Number} `b`
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| 32 | * @api public
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| 33 | */
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| 34 |
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| 35 | exports.subtract = function subtract(a, b) {
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| 36 | return a - b;
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| 37 | };
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| 38 |
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| 39 | /**
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| 40 | * Divide `a` (the numerator) by `b` (the divisor).
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| 41 | *
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| 42 | * ```js
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| 43 | * <%= divide(10, 2) %>
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| 44 | * //=> '5'
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| 45 | * ```
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| 46 | *
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| 47 | * @param {Number} `a` the numerator.
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| 48 | * @param {Number} `b` the divisor.
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| 49 | * @return {Number} The quotient of `a` divided by `b`.
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| 50 | * @api public
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| 51 | */
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| 52 |
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| 53 | exports.divide = function divide(a, b) {
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| 54 | return (+a) / (+b);
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| 55 | };
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| 56 |
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| 57 | /**
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| 58 | * Multiply `a` by `b`.
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| 59 | *
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| 60 | * ```js
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| 61 | * <%= divide(10, 2) %>
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| 62 | * //=> '5'
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| 63 | * ```
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| 64 | *
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| 65 | * @param {Number} `a`
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| 66 | * @param {Number} `b`
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| 67 | * @return {Number} The product of `a` times `b`.
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| 68 | * @api public
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| 69 | */
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| 70 |
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| 71 | exports.multiply = function multiply(a, b) {
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| 72 | return (+a) * (+b);
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| 73 | };
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| 74 |
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| 75 | /**
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| 76 | * Returns the largest integer less than or equal to the
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| 77 | * given `number`.
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| 78 | *
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| 79 | * ```js
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| 80 | * <%= floor(10.6) %>
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| 81 | * //=> '10'
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| 82 | * ```
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| 83 | *
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| 84 | * @param {Number} `number`
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| 85 | * @return {Number}
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| 86 | * @api public
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| 87 | */
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| 88 |
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| 89 | exports.floor = function floor(n) {
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| 90 | return Math.floor(+n);
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| 91 | };
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| 92 |
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| 93 | /**
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| 94 | * Returns the smallest integer greater than or equal to the
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| 95 | * given `number`.
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| 96 | *
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| 97 | * ```js
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| 98 | * <%= ceil(10.1) %>
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| 99 | * //=> '11'
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| 100 | * ```
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| 101 | *
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| 102 | * @param {Number} `number`
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| 103 | * @return {Number}
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| 104 | * @api public
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| 105 | */
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| 106 |
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| 107 | exports.ceil = function ceil(n) {
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| 108 | return Math.ceil(+n);
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| 109 | };
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| 110 |
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| 111 | /**
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| 112 | * Returns the value of the given `number` rounded to the
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| 113 | * nearest integer.
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| 114 | *
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| 115 | * ```js
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| 116 | * <%= round(10.1) %>
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| 117 | * //=> '10'
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| 118 | *
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| 119 | * <%= round(10.5) %>
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| 120 | * //=> '11'
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| 121 | * ```
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| 122 | *
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| 123 | * @param {Number} `number`
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| 124 | * @return {Number}
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| 125 | * @api public
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| 126 | */
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| 127 |
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| 128 | exports.round = function round(n) {
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| 129 | return Math.round(+n);
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| 130 | };
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| 131 |
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| 132 | /**
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| 133 | * Returns the sum of all numbers in the given array.
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| 134 | *
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| 135 | * ```js
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| 136 | * <%= sum([1, 2, 3, 4, 5]) %>
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| 137 | * //=> '15'
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| 138 | * ```
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| 139 | *
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| 140 | * @param {Number} `number`
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| 141 | * @return {Number}
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| 142 | * @api public
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| 143 | */
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| 144 |
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| 145 | exports.sum = function sum() {
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| 146 | var args = utils.flatten([].concat.apply([], arguments));
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| 147 | var len = args.length;
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| 148 | var idx = -1;
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| 149 | var num = 0;
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| 150 |
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| 151 | while (++idx < len) {
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| 152 | if (!utils.isNumber(args[idx])) {
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| 153 | continue;
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| 154 | }
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| 155 | num += (+args[idx]);
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| 156 | }
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| 157 | return num;
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| 158 | };
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