GeeksForGeeks/Array_Functions_2.html at master · hjaintech/GeeksForGeeks · GitHub

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<html>
	<head>
		<script type="text/javascript">


//--------------------------------------------------------------------------------------------------

		// #LOOP : Function to get the details of students who got more than 80 percent

	function fnFilterStudents_loop(aStudent){
		var tempArr = [];
		for(var i = 0 ; i < aStudent.length; i ++){
			if(aStudent[i].fPercentage > 80.0) { tempArr.push(aStudent[i]);}
		}
		return tempArr;
	}

	aStudent = [
		{ sStudentId : "001" , fPercentage : 91.2 },
		{ sStudentId : "002" , fPercentage : 78.7 },
		{ sStudentId : "003" , fPercentage : 62.9 },
		{ sStudentId : "004" , fPercentage : 81.4 }];

	console.log(fnFilterStudents_loop(aStudent));
	//Output:   [{ sStudentId : "001" , fPercentage : 91.2 },
	//	    	 { sStudentId : "004" , fPercentage : 81.4 }];


//--------------------------------------------------------------------------------------------------
		// #FILER : Function to get the details of students who got more than 80 percent

	function fnFilterStudents_filter(aStudent){
		return aStudent.filter(function(oStudent){
			return oStudent.fPercentage > 80.0 ? true : false;
		});
	}

	aStudent = [
		{ sStudentId : "001" , fPercentage : 91.2 },
		{ sStudentId : "002" , fPercentage : 78.7 },
		{ sStudentId : "003" , fPercentage : 62.9 },
		{ sStudentId : "004" , fPercentage : 81.4 }];

	console.log(fnFilterStudents_filter(aStudent));
	//Output:   [{ sStudentId : "001" , fPercentage : 91.2 },
	//	    	 { sStudentId : "004" , fPercentage : 81.4 }];
//--------------------------------------------------------------------------------------------------

	// Function to remove undefined elements from array

	function removeUndefined(myArray){
		return myArray.filter(function(element, index, array){
			return element;
		});
	}

	var arr = [1,undefined,3,undefined,5];

	console.log(arr);
	// Output : [1, undefined, 3, undefined, 5]

	console.log(removeUndefined(arr));
	// Output : [1, 3, 5]

//--------------------------------------------------------------------------------------------------

		// #lOOP : Function to add property bIsDistinction to each element

	function fnAddDistinction_loop(aStudent){
		for(var i = 0 ; i < aStudent.length ; i ++){
			aStudent[i].bIsDistinction = (aStudent[i].fPercentage >= 75.0) ? true : false;
		}
		return aStudent;
	}

	aStudent = [
		{ sStudentId : "001" , fPercentage : 91.2 },
		{ sStudentId : "002" , fPercentage : 78.7 },
		{ sStudentId : "003" , fPercentage : 62.9 },
		{ sStudentId : "004" , fPercentage : 81.4 }
	];

	console.log(fnAddDistinction_loop(aStudent));
	//output: [{ sStudentId : "001" , fPercentage : 91.2 , bIsDistinction : true },
	//		   { sStudentId : "002" , fPercentage : 78.7 , bIsDistinction : false },
	//	       { sStudentId : "003" , fPercentage : 62.9 , bIsDistinction : false },
	//	       { sStudentId : "004" , fPercentage : 81.4 , bIsDistinction : true }];

//-------------------------------------------------------------------------------------------------
		// #MAP : Function to add property bIsDistinction to each element

	function fnAddDistinction_map(aStudent){
		return aStudent.map(function(student, index, array){
					student.bIsDistinction = (student.fPercentage >= 75.0) ? true : false;
					return student;
				});
	}

	aStudent = [
		{ sStudentId : "001" , fPercentage : 91.2 },
		{ sStudentId : "002" , fPercentage : 78.7 },
		{ sStudentId : "003" , fPercentage : 62.9 },
		{ sStudentId : "004" , fPercentage : 81.4 }
	];

	console.log(fnAddDistinction_map(aStudent));
	//output: [{ sStudentId : "001" , fPercentage : 91.2 , bIsDistinction : true },
	//		   { sStudentId : "002" , fPercentage : 78.7 , bIsDistinction : false },
	//	       { sStudentId : "003" , fPercentage : 62.9 , bIsDistinction : false },
	//	       { sStudentId : "004" , fPercentage : 81.4 , bIsDistinction : true }];

//--------------------------------------------------------------------------------------------------

	[1,4,9].map(Math.sqrt);
	// Output : [1,2,3]

	["1.232","9.345","3.2345"].map(parseFloat);
	// Output : [1.232, 9.345, 3.2345]

	["1","2","3"].map(parseInt);
	// Output: [1, NaN, NaN]


	["1","2","3"].map(function(val){return parseInt(val,10)});
	//Output: [1, 2, 3]


		</script>
	</head>
	<body></body>
</html>