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Breadcrumbs

JavaScript_course

/

object-for-in.html

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33 lines (20 loc) · 354 Bytes

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JavaScript_course

/

object-for-in.html

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33 lines (20 loc) · 354 Bytes

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<!DOCTYPE HTML>

<html>

<head>

<meta charset="utf-8">

</head>

<body>

<script>

function isEmpty(obj) {

for (key in obj){

return false;

}

return true;

}

var schedule = {};

alert( isEmpty(schedule) );

schedule["8:30"] = "подъём";

alert( isEmpty(schedule) );

</script>

</body>

</html>

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