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Add deep merge

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This commit is contained in:
Jon Staab
2024-12-30 13:47:24 -08:00
parent 1b334276cf
commit 548da95623
2 changed files with 32 additions and 13 deletions
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packages/lib/src/Tools.ts
+31 -10
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@@ -9,6 +9,9 @@ export const isNil = (x: any) => [null, undefined].includes(x)
/** Type representing an optional value */
export type Maybe<T> = T | undefined
/** Type that is shorthand for Record<string, T> */
export type Obj<T = any> = Record<string, T>
/**
* Executes a function if the value is defined
* @param x - The value to check
@@ -139,7 +142,7 @@ export const take = <T>(n: number, xs: T[]) => xs.slice(0, n)
* @param x - Source object
* @returns New object without specified keys
*/
export const omit = <T extends Record<string, any>>(ks: string[], x: T) => {
export const omit = <T extends Obj>(ks: string[], x: T) => {
const r: T = {...x}
for (const k of ks) {
@@ -155,8 +158,8 @@ export const omit = <T extends Record<string, any>>(ks: string[], x: T) => {
* @param x - Source object
* @returns New object without entries containing specified values
*/
export const omitVals = <T extends Record<string, any>>(xs: any[], x: T) => {
const r: Record<string, any> = {}
export const omitVals = <T extends Obj>(xs: any[], x: T) => {
const r: Obj = {}
for (const [k, v] of Object.entries(x)) {
if (!xs.includes(v)) {
@@ -173,7 +176,7 @@ export const omitVals = <T extends Record<string, any>>(xs: any[], x: T) => {
* @param x - Source object
* @returns New object with only specified keys
*/
export const pick = <T extends Record<string, any>>(ks: string[], x: T) => {
export const pick = <T extends Obj>(ks: string[], x: T) => {
const r: T = {...x}
for (const k of Object.keys(x)) {
@@ -204,8 +207,8 @@ export function* range(a: number, b: number, step = 1) {
* @param x - Source object
* @returns Object with transformed keys
*/
export const mapKeys = <T extends Record<string, any>>(f: (v: string) => string, x: T) => {
const r: Record<string, any> = {}
export const mapKeys = <T extends Obj>(f: (v: string) => string, x: T) => {
const r: Obj = {}
for (const [k, v] of Object.entries(x)) {
r[f(k)] = v
@@ -236,7 +239,7 @@ export const mapVals = <V, U>(f: (v: V) => U, x: Record<string, V>) => {
* @param b - Right object
* @returns Merged object with a"s properties overriding b"s
*/
export const mergeLeft = <T extends Record<string, any>>(a: T, b: T) => ({
export const mergeLeft = <T extends Obj>(a: T, b: T) => ({
...b,
...a,
})
@@ -247,11 +250,29 @@ export const mergeLeft = <T extends Record<string, any>>(a: T, b: T) => ({
* @param b - Right object
* @returns Merged object with b"s properties overriding a"s
*/
export const mergeRight = <T extends Record<string, any>>(a: T, b: T) => ({
export const mergeRight = <T extends Obj>(a: T, b: T) => ({
...a,
...b,
})
/** Deep merge two objects, prioritizing the first argument. */
export const deepMergeLeft = (a: Obj, b: Obj) => deepMergeRight(b, a)
/** Deep merge two objects, prioritizing the second argument. */
export const deepMergeRight = (a: Obj, b: Obj) => {
a = {...a}
for (const [k, v] of Object.entries(b)) {
if (isPojo(v) && isPojo(a[k])) {
a[k] = deepMergeRight(a[k], v)
} else {
a[k] = v
}
}
return a
}
/**
* Checks if a number is between two values (exclusive)
* @param bounds - Lower and upper bounds
@@ -556,7 +577,7 @@ export const nthNe =
xs[i] !== v
/** Returns a function that checks if key/value pairs of x match all pairs in spec */
export const spec = (values: Record<string, any>) => (x: Record<string, any>) => {
export const spec = (values: Obj) => (x: Obj) => {
for (const [k, v] of Object.entries(values)) {
if (x[k] !== v) return false
}
@@ -1140,4 +1161,4 @@ export const hexToBech32 = (prefix: string, hex: string) =>
* @returns Hex encoded string
*/
export const bech32ToHex = (b32: string) =>
utf8.encode(bech32.fromWords(bech32.decode(b32, false).words))
utf8.encode(bech32.fromWords(bech32.decode(b32 as any, false).words))