manifold/common/util/array.ts
Marshall Polaris 456d9398a1
Revamp a lot of stuff on the user page to make it usably efficient (#751)
* Load bets and comments tabs data on user page independently

* Implement basic pagination on profile comments list

* Tweak server auth to return `null` instead of `undefined`

* Switch to SSR for user page

* Fix lint

* Fix broken contract fetching in user bets list

* Tidying
2022-08-12 20:42:58 -07:00

39 lines
813 B
TypeScript

export function filterDefined<T>(array: (T | null | undefined)[]) {
return array.filter((item) => item !== null && item !== undefined) as T[]
}
export function buildArray<T>(
...params: (T | T[] | false | undefined | null)[]
) {
const array: T[] = []
for (const el of params) {
if (Array.isArray(el)) {
array.push(...el)
} else if (el) {
array.push(el)
}
}
return array
}
export function groupConsecutive<T, U>(xs: T[], key: (x: T) => U) {
if (!xs.length) {
return []
}
const result = []
let curr = { key: key(xs[0]), items: [xs[0]] }
for (const x of xs.slice(1)) {
const k = key(x)
if (k !== curr.key) {
result.push(curr)
curr = { key: k, items: [x] }
} else {
curr.items.push(x)
}
}
result.push(curr)
return result
}