Need sample javascript object literal
I need a sample js object literal which can be accessed in the following way:
hist.undo[0].operation[0].x // would print '2' or whatever
hist.undo[0].operation[0].y // would 开发者_如何学Pythonprint '21' or whatever
// [...]
hist.undo[2].operation[0].x // would print '32' or whatever
hist.undo[2].operation[0].y // would print '12' or whatever
Thanks!
(working jsfiddle example here)
var sample_operation_member = {"x": 100, "y": 250};
var sample_undo_member = { "operation" : [sample_operation_member, sample_operation_member,sample_operation_member] };
var hist = {
"undo": [
sample_undo_member,
sample_undo_member,
sample_undo_member,
sample_undo_member
]
}
alert(hist.undo[0].operation[0].x);
Or, more verbosely:
var hist = {
undo: [
{"operation": [{"x": 100, "y":100},{"x": 100, "y":100},{"x": 100, "y":100}]},
{"operation": [{"x": 100, "y":100},{"x": 100, "y":100},{"x": 100, "y":100}]},
{"operation": [{"x": 100, "y":100},{"x": 100, "y":100},{"x": 100, "y":100}]},
{"operation": [{"x": 100, "y":100},{"x": 100, "y":100},{"x": 100, "y":100}]}
]
}
alert(hist.undo[0].operation[0].x);
<html>
<head>
</head>
<body>
test
<script>
hist = {
"undo" : [
{
"operation": [ {"x":"2","y":"21"}, {"x":"x2","y":"y21"} ]
},
{
"operation": [ {"x":"99","y":"88"} ]
},
{
"operation": [ {"x":"32","y":"12"} ]
}
]
};
alert(hist.undo[0].operation[0].x);
alert(hist.undo[0].operation[0].y);
alert(hist.undo[2].operation[0].x);
alert(hist.undo[2].operation[0].y);
</script>
</body>
</html>
hist = { "undo" : [
{"operation":[
{"x":2,"y":21},
{"x":3,"y":31}
]},
{"operation":[
{"x":4,"y":41},
{"x":5,"y":51}
]},
{"operation":[
{"x":6,"y":61},
{"x":7,"y":71}
]}
]
}
加载中,请稍侯......
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