Removing specific values from an array
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Posted on Going through Set is a fast and easy way to filter out duplicates from arrays. To filter out specific values instead, we can use a helper function like this one. We can pass it an array of values and a second array of all values we want to remove from the first one.
// takes an array of values and a second array of values to take out of it
const without = (array, valuesToRemove) => {
return array.filter(value => !valuesToRemove.includes(value))
}
// all instances of the values to filter out will be removed
without([0, 8, 12, 15, 4, 8, 15, 23], [8, 15]) // ⇒ [0, 12, 4, 23]
// using `.split()` and `.join()`, we can quickly filter values from strings
without("↑↑↓↓←→←→BA".split(""), ["←", "↑"]).join("") // ⇒ "↓↓→→BA"// takes an array of values and a second array of values to take out of it
const without = (array, valuesToRemove) => {
return array.filter(value => !valuesToRemove.includes(value))
}
// all instances of the values to filter out will be removed
without([0, 8, 12, 15, 4, 8, 15, 23], [8, 15]) // ⇒ [0, 12, 4, 23]
// using `.split()` and `.join()`, we can quickly filter values from strings
without("↑↑↓↓←→←→BA".split(""), ["←", "↑"]).join("") // ⇒ "↓↓→→BA"// takes an array of values and a second array of values to take out of it
const without = (array, valuesToRemove) => {
return array.filter(value => !valuesToRemove.includes(value))
}
// all instances of the values to filter out will be removed
without([0, 8, 12, 15, 4, 8, 15, 23], [8, 15]) // ⇒ [0, 12, 4, 23]
// using `.split()` and `.join()`, we can quickly filter values from strings
without("↑↑↓↓←→←→BA".split(""), ["←", "↑"]).join("") // ⇒ "↓↓→→BA"// takes an array of values and a second array of values to take out of it
const without = (array, valuesToRemove) => {
return array.filter(value => !valuesToRemove.includes(value))
}
// all instances of the values to filter out will be removed
without([0, 8, 12, 15, 4, 8, 15, 23], [8, 15]) // ⇒ [0, 12, 4, 23]
// using `.split()` and `.join()`, we can quickly filter values from strings
without("↑↑↓↓←→←→BA".split(""), ["←", "↑"]).join("") // ⇒ "↓↓→→BA"