var cards = [1, 2, 3, 4, 5, 6, 7 , 8, 9, 10];
// here is shows the length as 5, but there are 10 values
console.log(cards);
// If I remove this function, the array shows the correct length
var randomizeCards = function (deck){
var randomizer, randomizedDeck, randomPosition;
randomizer = deck;
randomizedDeck = [];
for(var i = 0; i < deck.length; i++) {
//max value 10, min value 0
randomPosition = Math.floor(Math.random() * randomizer.length);
//assigns value of randomPosition to the place of i in randomized deck
randomizedDeck[i] = randomizer[randomPosition];
//removes value of randomizer at randomPosition index
randomizer.splice(randomPosition, 1);
}
return randomizedDeck;
}
var randomCards = randomizeCards(cards);
// These end up being shuffled arrays with only 5 values
console.log(randomCards);
console.log(cards);
.splice()
removes an element from an array.切勿在拼接后再将项目添加回数组中,因此数组长度当然会有所不同