js-array-push-pop-shift-unshift.js

var rsvps = ["julie", "greg", "jess", "nicole", "kenn", "al", "angelina", "boo balm"];
console.log("rsvps:", rsvps);

// we need to add Dave to the end of party list
rsvps.push("dave");
console.log("after adding dave:", rsvps);

// julie can't make it, lets take her off the top
rsvps.shift();
console.log("after shifting julie:", rsvps);

// moms comming so put her first on the list
rsvps.unshift("mom");
console.log("after unshifting mom:", rsvps);

// dave can't make it anymore, take him off the end
rsvps.pop("dave");
console.log("after popping dave off:", rsvps);

// remember array index starts at zero
rsvps = ["tracy", "bedford", "christina", "nicole", "lisa", "mark", "aaron", "marina"];
console.log("new party rsvps", rsvps);
// make a new list for the guys only after party using someArray[index] and push
var guys = [];
var otherGuys = [];
guys.push( rsvps[1]); //bedford
guys.push( rsvps[5]); //mark
guys.push( rsvps[6]); //aaron
otherGuys.push(rsvps[1],rsvps[5],rsvps[6]);
console.log("guys after-party", guys);
console.log("other guys after-party", otherGuys);