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djD-REK/Comparing .includes(), .filter(), and .some() in JavaScript.js

Created April 15, 2020 01:48
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Comparing .includes(), .filter(), and .some() in JavaScript.js
const SIZE_OF_ARRAY = 10
const anArray = Array.from(Array(SIZE_OF_ARRAY + 1).keys())
anArray.shift()
console.log(anArray) // Array(10) [ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 ]
const SEARCH_VALUE = SIZE_OF_ARRAY / 2 // i.e. 5
anArray.includes(SEARCH_VALUE) // true
anArray.filter((x) => x === SEARCH_VALUE).length > 0 // true
anArray.some((x) => x === SEARCH_VALUE) // true
let foundIt = false
for (let index = 0; index < anArray.length; index++) {
if (anArray[index] === SEARCH_VALUE) {
foundIt = true
break
}
}
console.log(
`anArray.includes(${SEARCH_VALUE}) is ${anArray.includes(SEARCH_VALUE)}`
)
console.log(
`anArray.filter((x) => x === ${SEARCH_VALUE}).length > 0 is ${
anArray.filter((x) => x === SEARCH_VALUE).length > 0
}`
)
console.log(
`anArray.some((x) => x === ${SEARCH_VALUE}) is ${anArray.some(
(x) => x === SEARCH_VALUE
)}`
)
console.log(`The variable foundIt from the for loop is ${foundIt}`)
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