selfSome.js

const selfSome = function (fn, context) {
    let arr = Array.prototype.slice.call(this)
    if(!arr.length) return false
    for (let i = 0; i < arr.length; i++) {
        if(!arr.hasOwnProperty(i)) continue;
        let res = fn.call(context,arr[i],i,this)
        if(res)return true
    }
    return false
}

Array.prototype.selfSome = selfSome;