@bitbite/filtered-list/src/FilteredList.ts

filter a list of items

export class FilteredList<T> {

    public filtered: Array<T> = []

    private assertions: Assertion<T>[] = []
    
    constructor(private list: Array<T>) {}

    private assertAll = (item: T) : boolean => {
        return this.assertions.some( assertion => assertion(item) === false ) ? false : true
    }
    
    /**
     * Assert all
     * @param assertions a list of assertions to be executed
     */
    assert(...assertions: Assertion<T>[]): Array<T> {
        this.assertions = assertions
        this.filtered = this.list.filter(this.assertAll)
        return this.filtered;
    }

}