我如何切出包含值的所有数组对象并将它们存储在新数组中

Question

So I have this array and I want to make a new array with those objects that have the swimming value in sports.

 var watchesArray = [
        {
          model: "Swim", 
          image:"",
          price: 149.99,
          sports:["Swimming", "Running"]
        },
        {
          model: "FR 10", 
          image:"",
          price: 129.99,
          sports:["Running"]

        },
        {
          model: "FR 15", 
          image:"",
          price: 199.99,
          sports:["Running"]

        },
    ];

So far I have this but I dont know how to add on to the sliced array with each go around in the for loop. How should I do this?

 for (var i = 0; i < watchesArrayLength; i++) {
        if (watchesArray[i].sports.indexOf("Swimming") > -1) {
            var runningWatchArray = watchesArray.slice(i);

        }

    }

Answer 1

You can use .filter() method:

watchesArray = [...];

var result = watchesArray.filter(function(watch) {
    return watch.sports.indexOf('Swimming') !== -1;
});

Answer 2

If I understand correctly, what you want is

var runningWatchArray = [];
for (var i = 0; i < watchesArrayLength; i++) {
    if (watchesArray[i].sports.indexOf("Swimming") > -1) {
        var watch = watchesArray.slice(i);
        runningWatchArray.push(watch);
    }
}

Answer 3

You could also use forEach to loop through each item of the watchesArray...

var runningWatchArray = new Array();

watchesArray.forEach(function(watch){
      if (watch.sports.indexOf("Swimming") > -1) {
        runningWatchArray.push(watch);
      }
    }