Using JavaScript includes to verify the presence of various values

let colorSet = ["black", "red", "pink", ];

This is the colorSet array. I can easily check if a specific value is present in the colorSet array. For example, to check if "red" is present in the array, I can use the following code:

let isRedPresent = colorSet.includes("red"); // returns true

Now, I want a way to determine if "red", "white", or "blue" exists in the colorSet array. How can I achieve this? Any suggestions or solutions for this scenario?

Answer №1

When dealing with arrays, it's important to know how to compare them. The solution will vary depending on your specific requirements.

const colors = ["black", "red", "pink" ]

const checkFor = ["red", "white"]

const hasAll = checkFor.every(color => colors.includes(color))
const hasSome = checkFor.some(color => colors.includes(color))
const included = checkFor.filter(color => colors.includes(color))
const excluded = checkFor.filter(color => !colors.includes(color))
const checks = checkFor.reduce((obj, color) => ({[color]: colors.includes(color), ...obj}), {})

console.log('hasAll', hasAll)
console.log('hasSome', hasSome)
console.log('included', included)
console.log('excluded', excluded)
console.log('checks', checks, checks.red)

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