Stew.filter() - shysolocup/stews GitHub Wiki
removes entries that don't pass a check function
type: Function
arguments:
- checker
 Function:
goes through every entry with the function
if it returns false it removes that entry
see Stew.forEach() for more info
| list: | pair: | 
const { Stew } = require('stews');
let arr = new Stew([ "abc", "def", "abcdef" ]);
console.log(arr.filter( (v, i) => {
    // if it doesn't include "abc" remove it
    return v.includes("abc");
})); | 
const { Stew } = require('stews');
let obj = new Stew({ key1: "val1", key2: "valA", key3: "B" });
console.log(obj.filter( (k, v, i) => {
    // if it doesn't include "val" remove it
    return v.includes("val");
})); | 
Stew(2) [ "abc", "abcdef" ]  | 
Stew(2) { key1: "val1", key2: "valA" } |