59ca1f7640
* Make `groupConsecutive` more capable * Put denormalized `contractQuestion` and `contractSlug` on comments * Update user profile UI to use new denormalized fields * `/Austin` -> `/market`
41 lines
856 B
TypeScript
41 lines
856 B
TypeScript
import { isEqual } from 'lodash'
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export function filterDefined<T>(array: (T | null | undefined)[]) {
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return array.filter((item) => item !== null && item !== undefined) as T[]
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}
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export function buildArray<T>(
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...params: (T | T[] | false | undefined | null)[]
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) {
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const array: T[] = []
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for (const el of params) {
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if (Array.isArray(el)) {
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array.push(...el)
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} else if (el) {
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array.push(el)
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}
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}
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return array
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}
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export function groupConsecutive<T, U>(xs: T[], key: (x: T) => U) {
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if (!xs.length) {
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return []
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}
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const result = []
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let curr = { key: key(xs[0]), items: [xs[0]] }
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for (const x of xs.slice(1)) {
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const k = key(x)
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if (!isEqual(key, curr.key)) {
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result.push(curr)
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curr = { key: k, items: [x] }
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} else {
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curr.items.push(x)
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}
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}
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result.push(curr)
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return result
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}
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