Function arrayUnique

Source

export function arrayUnique<T_ArrayItem>(
    arr: T_ArrayItem[],
    args: Partial<arrayUnique.Args> = {},
): T_ArrayItem[] {

    // returns
    if ( !Array.isArray( arr ) ) { return arr; }

    const {
        compareViaJson = false,
    } = args;

    // returns
    if ( !compareViaJson ) {
        return [ ...arr ].filter( ( v, i, a ) => a.indexOf( v ) === i );
    }

    const stringify = ( value: any ) => JSON.stringify(
        typeof value === 'object'
            ? Array.isArray( value )
                ? value.sort()
                : objectKeySort( JSON.parse( JSON.stringify( value ) ) )
            : value
    );

    const jsonArr = [ ...arr ].map( stringify );

    return [ ...arr ].filter( ( v, i ) => jsonArr.indexOf( stringify( v ) ) === i );
}
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