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diff-object.ts
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diff-object.ts
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export interface DiffObjectResult<T, K> {
/** Keys that have been added to the Object. */
added: (keyof K & keyof T)[]
/** Keys that are consistent but have changed. */
changed: (keyof K & keyof T)[]
/** Keys that have been removed. */
removed: (keyof K & keyof T)[]
/** Keys that remained the same */
same: (keyof K & keyof T)[]
}
export const diffObject = <T extends {}, K extends {}>(
original: T,
compare: K
): DiffObjectResult<T, K> => {
const result: DiffObjectResult<T, K> = {
added: [],
changed: [],
removed: [],
same: []
}
Object.keys(original).forEach(key => {
if (compare.hasOwnProperty(key)) {
// Key from Original exists in Compare
//eslint-disable-next-line
if (
(compare as {[key: string]: string})[key] !==
(original as {[key: string]: string})[key]
) {
//eslint-disable-next-line
result.changed.push(key as any)
} else {
//eslint-disable-next-line
result.same.push(key as any)
}
} else {
//eslint-disable-next-line
result.removed.push(key as any)
}
})
Object.keys(compare).forEach(key => {
if (!original.hasOwnProperty(key)) {
//eslint-disable-next-line
result.added.push(key as any)
}
})
return result
}