I know I can iterate over an object array and check values by utilizing the key. But is there a way to check the key by looking at the value? I use jQuery although I think this is simply a javascript question.
var j = [
{hello : 1},
{hello : 2},
{bye : 3}
]
$.each(j, function(i,item){
if(item.hello==1) alert("hello");
});
How do I make the alert dependent on the value being 1, irrespective of what key it is?
Try
var j = [
{hello : 1},
{hello : 2},
{bye : 3}
];
$.each(j, function(i, item){;
$.each(item, function(key, value) {
if (value === 1) {
alert("it said hello")
}
})
});
You would have to iterate through each key in the array, like this:
$.each(j, function(i,item){
for (var key in item) {
if (item[key]==1) {
alert("it said hello");
}
}
});
But why not store it in another format, if that's how you'd like to use it? ie,
var j = [
[hello, 1],
[hello, 2],
[bye, 3]
]
There's the for-of loop proposed in ECMAScript 6.
for (item of j){
if(item.hello==1){
alert("it said hello");
}
}
This feature appeared in Firefox 31 and it is shipped with Chrome 38. IE doesn't implement it. Don't know about other browsers.
For expample:
var j = [ {hello : 1}, {hello : 2}, {bye : 3} ];
for (var i in j)
{
for (var s in j[i])
{
if (j[i][s] == 1)
{
alert("it said hello");
}
}
}
