Question

我有一系列这样的小目标:

var myArray = [
  {name: foo ,number:2},
  {name: bar ,number:9},
  {etc.}
]

How do I detect if myArray contains an object with name="foo"?

Answer 1

除非我没有东西,否则,你至少应该把每一个东西用于可读性而不是地图。而为了业绩,你一旦发现你重新找回的东西,就应当打破僵局:

var hasFoo = false;
$.each(myArray, function(i,obj) {
  if (obj.name ===  foo ) { hasFoo = true; return false;}
});

Answer 2

为此:

$.each(myArray, function(i, obj){
   if(obj.name == foo )
     alert("Index "+i + " has foo");
});

卡车

Answer 3

for(var i = 0; i < myArray.length; i++) { 
   if (myArray[i].name ==  foo ) 
        alert( success! ) 
 }

Answer 4

var hasFoo = false;
$.map(myArray, function(v) {
  if (v.name ===  foo ) { hasFoo = true; }
});