Commit 0a7897b

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add absoluteValue function

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Original file line number	Diff line number	Diff line change
`@@ -28,4 +28,5 @@ module.exports = Object.assign(`
`28`	`28`	`require('./lib/isPositiveInteger.js'),`
`29`	`29`	`require('./lib/isDecimal.js'),`
`30`	`30`	`require('./lib/isNegativeInteger.js'),`
	`31`	`+ require('./lib/absoluteValue.js'),`
`31`	`32`	`);`

Lines changed: 23 additions & 0 deletions

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`@@ -0,0 +1,23 @@`
	`1`	`+`
	`2`	`+const handleErrors = (params) => {`
	`3`	`+ if (params.length === 0) throw new Error('Must provide one or more paramters');`
	`4`	`+ if (params.some(param => typeof param !== 'number')) {`
	`5`	`+ throw new Error('One of your parameters does not evaluate to a number');`
	`6`	`+ }`
	`7`	`+ // JS can only safely represent and compare integers`
	`8`	`+ // between Number.MAX_SAFE_INTEGER and Number.MAX_SAFE_INTEGER`
	`9`	`+ if (params.some(param => param > Number.MAX_SAFE_INTEGER \|\| param < Number.MIN_SAFE_INTEGER)) {`
	`10`	`+ throw new Error('Cannot reliably test primality of numbers larger than 9,007,199,254,740,991 or smaller than -9,007,199,254,740,991');`
	`11`	`+ }`
	`12`	`+};`
	`13`	`+`
	`14`	`+/**`
	`15`	`+ * This function converts all numbers to a positive number`
	`16`	`+ * @memberof variadic`
	`17`	`+ * @author tdnelson`
	`18`	`+ * @param {...*} params - One or more parameters.`
	`19`	`+ */`
	`20`	`+exports.absoluteValue = (...params) => {`
	`21`	`+ handleErrors(params);`
	`22`	`+ return params.map((num) => Math.abs(num));`
	`23`	`+}`

Lines changed: 27 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,27 @@`
	`1`	`+const { absoluteValue } = require('../lib/absoluteValue');`
	`2`	`+`
	`3`	`+describe('absoluteValue', () => {`
	`4`	`+ it('should return the absolute value of all parameters, given that all parameters evaluate to numbers', () => {`
	`5`	`+ let result = absoluteValue(1.6,-2.3325,-9007199254740990,596960,3938475,+"-395757");`
	`6`	`+ expect(result).toBe(1.6, 2.3325, 9007199254740990, 596960, 3938475,395757);`
	`7`	`+`
	`8`	`+ result = absoluteValue(1);`
	`9`	`+ expect(result).toBe(1);`
	`10`	`+ });`
	`11`	`+`
	`12`	`+ it('should throw an error when no parameters are provided', () => {`
	`13`	`+ expect(absoluteValue).toThrow();`
	`14`	`+ });`
	`15`	`+`
	`16`	`+ it('should throw an error when at least one parameter does not evaluate to a number', () => {`
	`17`	`+ expect(() => absoluteValue('yo')).toThrow();`
	`18`	`+ });`
	`19`	`+`
	`20`	`+ it('should throw an error when at least one parameter evaluates to a number larger than Number.MAX_SAFE_INTEGER', () => {`
	`21`	`+ expect(() => absoluteValue(Number.MAX_SAFE_INTEGER + 1)).toThrow();`
	`22`	`+ });`
	`23`	`+`
	`24`	`+ it('should throw an error when at least one parameter evaluates to a number smaller than Number.MIN_SAFE_INTEGER', () => {`
	`25`	`+ expect(() => absoluteValue(Number.MIN_SAFE_INTEGER - 1)).toThrow();`
	`26`	`+ });`
	`27`	`+});`

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