Underscore.js _.each()
Underscore each function is used to iterate over a list of elements.
The full function signature is _.each(list, iteratee, [context]).
The second function parameter “iteratee” is a function and will be called against each item of the iterated list object or array passed as its first argument.
Each invocation of iteratee is called with three arguments: (element, index, list)
For example,
<!DOCTYPE html>
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore.js"></script>
<script type="text/javascript">
var employees = ["Andy","Bob","Charlie"];
_.each(employees,function(name,index){
console.log("Employee " + name + " is present at index " + index);
});
</script>
</head>
</html>
Output :
Similarly, we can iterate over an array of objects in following manner :
<!DOCTYPE html>
<html>
<head>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore.js"></script>
<script type="text/javascript">
var employees = [{name:"Andy", age:21},
{name:"Bob", age:31},
{name:"Charlie", age:41}];
_.each(employees,function(value,key){
console.log("Name: " + value.name + " , Age: " + value.age);
});
</script>
</head>
</html>
Output :
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