ts-math-utils

<!doctype html> <html lang="en"> <head> <title>Code coverage report for interval.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="prettify.css" /> <link rel="stylesheet" href="base.css" /> <link rel="shortcut icon" type="image/x-icon" href="favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="index.html">All files</a> interval.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 100% Statements 89/89 </div> <div class='fl pad1y space-right2'> 100% Branches 93/93 </div> <div class='fl pad1y space-right2'> 100% Functions 24/24 </div> <div class='fl pad1y space-right2'> 100% Lines 89/89 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. <template id="filterTemplate"> <div class="quiet"> Filter: <input type="search" id="fileSearch"> </div> </template> </div> <div class='status-line high'></div> <pre><table class="coverage"> <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> <a name='L2'></a><a href='#L2'>2</a> <a name='L3'></a><a href='#L3'>3</a> <a name='L4'></a><a href='#L4'>4</a> <a name='L5'></a><a href='#L5'>5</a> <a name='L6'></a><a href='#L6'>6</a> <a name='L7'></a><a href='#L7'>7</a> <a name='L8'></a><a href='#L8'>8</a> <a name='L9'></a><a href='#L9'>9</a> <a name='L10'></a><a href='#L10'>10</a> <a name='L11'></a><a href='#L11'>11</a> <a name='L12'></a><a href='#L12'>12</a> <a name='L13'></a><a href='#L13'>13</a> <a name='L14'></a><a href='#L14'>14</a> <a name='L15'></a><a href='#L15'>15</a> <a name='L16'></a><a href='#L16'>16</a> <a name='L17'></a><a href='#L17'>17</a> <a name='L18'></a><a href='#L18'>18</a> <a name='L19'></a><a href='#L19'>19</a> <a name='L20'></a><a href='#L20'>20</a> <a name='L21'></a><a href='#L21'>21</a> <a name='L22'></a><a 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394x 3x         391x 391x 391x         678x     37x 37x 2x   35x         665x     35x 35x 4x   31x       715x     32x 32x 31x   1x         547x     30x 30x 1x   29x               14x 14x 14x             82x   82x 13x   69x     82x             71x   71x 10x   61x     71x             33x 17x 17x   17x     16x             53x                   147x 147x 147x       136x     136x 17x       119x 119x 3x     116x             492x 492x 492x                           55x 55x 32x   23x                         82x 82x 82x 82x 13x   69x 69x   69x 67x   66x 66x 66x         66x 12x   54x       134x       167x       3x 294x    </td><td class="text"><pre class="prettyprint lang-js">// Simple numeric type - just number and bigint export type NumericValue = number | bigint; /** * Represents an interval number * isClosed is optional and defaults to true. * isClosed represents if the number is included in the interval. */ export class IntervalNumber { readonly number: NumericValue; readonly isClosed: boolean;   constructor(number: NumericValue, isClosed: boolean = true) { this.number = number; this.isClosed = isClosed; }   /** * Returns true if the given IntervalNumber is equal to this IntervalNumber. */ equals(x: IntervalNumber | NumericValue): boolean { if (typeof x === 'number' || typeof x === 'bigint') { x = new IntervalNumber(x); } return this.number === x.number && this.isClosed === x.isClosed; } }   /** * Represents an interval. * To not be opinionated, we use a and b to represent the interval, where either a or b can be greater than the other. * name is optional, but can be useful for keeping track of the interval. * @example * const interval: IInterval = { a: new IntervalNumber(1, false), b: new IntervalNumber(10), name: 'Interval 1' }; */ export type IInterval = { a: IntervalNumber, b: IntervalNumber, name?: string };   /** * Represents an interval. * To not be opinionated, we use a and b to represent the interval, where either a or b can be greater than the other. * name is optional, but can be useful for keeping track of the interval. * @example * const interval: Interval = new Interval({ a: new IntervalNumber(1, false), b: new IntervalNumber(10), name: 'Interval 1' }); * console.log(interval.toString()); // (1, 10] */ export class Interval implements IInterval { private _a: IntervalNumber; private _b: IntervalNumber; public name?: string;   constructor(interval: IInterval | string) { if (typeof interval === 'string') { interval = Interval.toInterval(interval); }   if (!Interval.validInterval(interval)) { throw new Error( `Invalid interval: Cannot exclude either minimum (${interval.a.number}) or maximum (${interval.b.number}) values if they are equal.` ); }   this._a = interval.a; this._b = interval.b; this.name = interval.name; }   get a(): IntervalNumber { // return a copy of the interval number return new IntervalNumber(this._a.number, this._a.isClosed); } set a(value: IntervalNumber | NumericValue) { value = Interval.toIntervalNumber(value); if (this._b.number === value.number && !this._b.isClosed && !value.isClosed) { throw new Error('Invalid interval. Cannot exclude either minimum and maximum values if they are equal.'); } this._a = value; }   get b(): IntervalNumber { // return a copy of the interval number return new IntervalNumber(this._b.number, this._b.isClosed); } set b(value: IntervalNumber | NumericValue) { value = Interval.toIntervalNumber(value); if (this._a.number === value.number && !this._a.isClosed && !value.isClosed) { throw new Error('Invalid interval. Cannot exclude either minimum and maximum values if they are equal.'); } this._b = value; }   get min(): IntervalNumber { return this._a.number < this._b.number ? this._a : this._b; } set min(value: IntervalNumber | NumericValue) { value = Interval.toIntervalNumber(value); if (this._a.number === this.min.number) { this.a = value; } else { this.b = value; } }   get max(): IntervalNumber { return this._a.number > this._b.number ? this._a : this._b; } set max(value: IntervalNumber | NumericValue) { value = Interval.toIntervalNumber(value); if (this._a.number === this.max.number) { this.a = value; } else { this.b = value; } }   /** * Returns true if the interval contains the given number. */ containsNumber(x: NumericValue): boolean { const isAboveMin = this.min.number < x || (this.min.number === x && this.min.isClosed); const isBelowMax = this.max.number > x || (this.max.number === x && this.max.isClosed); return isAboveMin && isBelowMax; }   /** * Returns true if the interval contains the given IntervalNumber that represents a minimum value. */ containsMin(x: IntervalNumber): boolean { let containsMinValue = false; // there's directionality when the number passed in is open and a minimum if (!x.isClosed) { containsMinValue = this.min.number <= x.number && this.max.number > x.number; } else { containsMinValue = (this.min.number < x.number || (this.min.number === x.number && this.min.isClosed)) && (this.max.number > x.number || (this.max.number === x.number && this.max.isClosed)); } return containsMinValue; }   /** * Returns true if the interval contains the given IntervalNumber that represents a maximum value. */ containsMax(x: IntervalNumber): boolean { let containsMaxValue = false; // there's directionality when the number passed in is open and a maximum if (!x.isClosed) { containsMaxValue = this.min.number < x.number && this.max.number >= x.number; } else { containsMaxValue = (this.min.number < x.number || (this.min.number === x.number && this.min.isClosed)) && (this.max.number > x.number || (this.max.number === x.number && this.max.isClosed)); } return containsMaxValue; }   /** * Returns true if the interval contains the given IntervalNumber or Interval. */ contains(x: IntervalNumber | Interval): boolean { if (Interval.isIntervalNumber(x)) { const isAboveMin = this.min.number < x.number || (this.min.number === x.number && this.min.isClosed && x.isClosed); const isBelowMax = this.max.number > x.number || (this.max.number === x.number && this.max.isClosed && x.isClosed);   return isAboveMin && isBelowMax; }   return this.containsMin(x.min) && this.containsMax(x.max); }   /** * Returns true if the interval overlaps with the given interval. */ overlaps(interval: Interval): boolean { return this.containsMin(interval.min) || this.containsMax(interval.max); }   /** * Returns a string representation of the interval. * @example * const interval: Interval = new Interval({ a: new IntervalNumber(1, false), b: new IntervalNumber(10), name: 'Interval 1' }); * console.log(interval.toString()); // (1, 10] */ toString(): string { const aIsClosedChar: string = this._a.isClosed ? '[' : '('; const bIsClosedChar: string = this._b.isClosed ? ']' : ')'; return `${aIsClosedChar}${formatNumericValue(this._a.number)}, ${formatNumericValue(this._b.number)}${bIsClosedChar}`; }   private static parseNumericString(str: string): NumericValue { const trimmed = str.trim();   // Handle BigInt notation (ends with 'n') if (trimmed.endsWith('n')) { return BigInt(trimmed.slice(0, -1)); }   // Use Number() for everything else (handles hex, octal, binary automatically) const num = Number(trimmed); if (isNaN(num)) { throw new Error(`Invalid numeric string: ${str}`); }   return num; }   /** * Returns true if the given interval is valid. */ static validInterval(interval: IInterval): boolean { const aIsValid = typeof interval.a.number === 'number' || typeof interval.a.number === 'bigint'; const bIsValid = typeof interval.b.number === 'number' || typeof interval.b.number === 'bigint'; return aIsValid && bIsValid && (interval.a.number !== interval.b.number || (interval.a.isClosed && interval.b.isClosed)); }   /** * Returns true if the given string is a valid interval. * Supports the use of -Infinity and Infinity. * @param interval - The string representation of the interval. * @example * console.log(Interval.validIntervalString('(1, 10]')); // true * console.log(Interval.validIntervalString('1, 10]')); // false * @returns A boolean indicating if the string is a valid interval. */ static validIntervalString(interval: string): boolean { try { const intervalObj = Interval.toInterval(interval); return Interval.validInterval(intervalObj); } catch { return false; } }   /** * Takes a string representation of an interval and returns an Interval object. * @param interval - The string representation of the interval. * @returns An Interval object. * @example * const interval: Interval = Interval.toInterval('(1, 10]'); * console.log(interval.toString()); // (1, 10] */ static toInterval(interval: string): IInterval { const intervalTrimmed = interval.trim(); const startSymbol = intervalTrimmed[0]; const endSymbol = intervalTrimmed[intervalTrimmed.length - 1]; if (startSymbol !== '(' && startSymbol !== '[' || endSymbol !== ')' && endSymbol !== ']') { throw new Error(`Invalid interval string: ${interval}`); } const a = intervalTrimmed.slice(1, intervalTrimmed.indexOf(',')).trim(); const b = intervalTrimmed.slice(intervalTrimmed.indexOf(',') + 1, intervalTrimmed.length - 1).trim(); const aNum = Interval.parseNumericString(a); const bNum = Interval.parseNumericString(b);   const aIsClosed = startSymbol === '['; const bIsClosed = endSymbol === ']'; const iInterval: IInterval = { a: new IntervalNumber(aNum, aIsClosed), b: new IntervalNumber(bNum, bIsClosed) }; if (!Interval.validInterval(iInterval)) { throw new Error(`Invalid interval string: ${interval}`); } return iInterval; }   private static toIntervalNumber(x: IntervalNumber | NumericValue, isClosed = true): IntervalNumber { return Interval.isIntervalNumber(x) ? x : new IntervalNumber(x, isClosed); }   static isIntervalNumber(x: any): x is IntervalNumber { return x instanceof IntervalNumber; } }   export function formatNumericValue(v: NumericValue): string { return typeof v === 'bigint' ? `${v}n` : `${v}`; }  </pre></td></tr></table></pre> <div class='push'></div> </div> <div class='footer quiet pad2 space-top1 center small'> Code coverage generated by <a href="https://istanbul.js.org/" target="_blank" rel="noopener noreferrer">istanbul</a> at 2025-06-29T19:25:41.703Z </div> <script src="prettify.js"></script> <script> window.onload = function () { prettyPrint(); }; </script> <script src="sorter.js"></script> <script src="block-navigation.js"></script> </body> </html>