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Diffstat (limited to 'includes/external/addressbook/node_modules/nth-check/lib/compile.js')
-rw-r--r-- | includes/external/addressbook/node_modules/nth-check/lib/compile.js | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/includes/external/addressbook/node_modules/nth-check/lib/compile.js b/includes/external/addressbook/node_modules/nth-check/lib/compile.js deleted file mode 100644 index cef1af4..0000000 --- a/includes/external/addressbook/node_modules/nth-check/lib/compile.js +++ /dev/null @@ -1,121 +0,0 @@ -"use strict"; -var __importDefault = (this && this.__importDefault) || function (mod) { - return (mod && mod.__esModule) ? mod : { "default": mod }; -}; -Object.defineProperty(exports, "__esModule", { value: true }); -exports.generate = exports.compile = void 0; -var boolbase_1 = __importDefault(require("boolbase")); -/** - * Returns a function that checks if an elements index matches the given rule - * highly optimized to return the fastest solution. - * - * @param parsed A tuple [a, b], as returned by `parse`. - * @returns A highly optimized function that returns whether an index matches the nth-check. - * @example - * - * ```js - * const check = nthCheck.compile([2, 3]); - * - * check(0); // `false` - * check(1); // `false` - * check(2); // `true` - * check(3); // `false` - * check(4); // `true` - * check(5); // `false` - * check(6); // `true` - * ``` - */ -function compile(parsed) { - var a = parsed[0]; - // Subtract 1 from `b`, to convert from one- to zero-indexed. - var b = parsed[1] - 1; - /* - * When `b <= 0`, `a * n` won't be lead to any matches for `a < 0`. - * Besides, the specification states that no elements are - * matched when `a` and `b` are 0. - * - * `b < 0` here as we subtracted 1 from `b` above. - */ - if (b < 0 && a <= 0) - return boolbase_1.default.falseFunc; - // When `a` is in the range -1..1, it matches any element (so only `b` is checked). - if (a === -1) - return function (index) { return index <= b; }; - if (a === 0) - return function (index) { return index === b; }; - // When `b <= 0` and `a === 1`, they match any element. - if (a === 1) - return b < 0 ? boolbase_1.default.trueFunc : function (index) { return index >= b; }; - /* - * Otherwise, modulo can be used to check if there is a match. - * - * Modulo doesn't care about the sign, so let's use `a`s absolute value. - */ - var absA = Math.abs(a); - // Get `b mod a`, + a if this is negative. - var bMod = ((b % absA) + absA) % absA; - return a > 1 - ? function (index) { return index >= b && index % absA === bMod; } - : function (index) { return index <= b && index % absA === bMod; }; -} -exports.compile = compile; -/** - * Returns a function that produces a monotonously increasing sequence of indices. - * - * If the sequence has an end, the returned function will return `null` after - * the last index in the sequence. - * - * @param parsed A tuple [a, b], as returned by `parse`. - * @returns A function that produces a sequence of indices. - * @example <caption>Always increasing (2n+3)</caption> - * - * ```js - * const gen = nthCheck.generate([2, 3]) - * - * gen() // `1` - * gen() // `3` - * gen() // `5` - * gen() // `8` - * gen() // `11` - * ``` - * - * @example <caption>With end value (-2n+10)</caption> - * - * ```js - * - * const gen = nthCheck.generate([-2, 5]); - * - * gen() // 0 - * gen() // 2 - * gen() // 4 - * gen() // null - * ``` - */ -function generate(parsed) { - var a = parsed[0]; - // Subtract 1 from `b`, to convert from one- to zero-indexed. - var b = parsed[1] - 1; - var n = 0; - // Make sure to always return an increasing sequence - if (a < 0) { - var aPos_1 = -a; - // Get `b mod a` - var minValue_1 = ((b % aPos_1) + aPos_1) % aPos_1; - return function () { - var val = minValue_1 + aPos_1 * n++; - return val > b ? null : val; - }; - } - if (a === 0) - return b < 0 - ? // There are no result — always return `null` - function () { return null; } - : // Return `b` exactly once - function () { return (n++ === 0 ? b : null); }; - if (b < 0) { - b += a * Math.ceil(-b / a); - } - return function () { return a * n++ + b; }; -} -exports.generate = generate; -//# sourceMappingURL=compile.js.map
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