***Using JavaScript****** Problem 1: The previous chapter introduced the standar
ID: 3804295 • Letter: #
Question
***Using JavaScript******
Problem 1:
The previous chapter introduced the standard function Math.max() that returns its largest argument. We can do that ourselves now. Write a function max() that takes three arguments and returns their maximum. Submit JS file.
// Your code here. Output as follows.
console.log(max(0, 10, 100));
// 100
console.log(max(0, -10, -100));
// -0
Problem 2:
Write a JavaScript function that accepts two arguments, a string and a letter and the function will count the number of occurrences of the specified letter within the string. Output returned values to console.log(). Submit JS file.
Sample arguments : 'w3resource.com', 'o'
Expected output : 2
Problem 3:
Write a JavaScript function which accepts an argument and returns the type. Output returned value to console.log(). Submit HTML with external JS file.
Note : There are six possible values that typeof() returns: object, boolean, function, number, string, and undefined.
Explanation / Answer
Problem 1:
<!DOCTYPE html>
<html>
<body>
<p>Click the button to return the highest number of the arguments.</p>
<button>Try it</button>
<p id="demo"></p>
<script>
function myFunction() {
document.getElementById("demo").innerHTML = Math.max(0,-10, -100);
}
</script>
</body>
</html>
Problem:2
function Char_Counts(str1)
{
var uchars = {};
str1.replace(/S/g, function(l){
uchars[l] = (isNaN(uchars[l]) ? 1 : uchars[l] + 1);
});
return uchars;
}
console.log(Char_Counts("hello user"));
Problem 3:
Html code:
<!DOCTYPE html>
<html>
<head>
<meta charset=utf-8 />
<title>Detect JavaScript Data Types
</title>
</head>
<body>
</body>
</html>
JavaScript Code :
function detect_data_type(value)
{
var dtypes = [Function, RegExp, Number, String, Boolean, Object], x, len; if (typeof value === "object" || typeof value === "function")
{
for (x = 0, len = dtypes.length; x < len; x++)
{
if (value instanceof dtypes[x])
{
return dtypes[x];
}
}
}
return typeof value;
}
console.log(detect_data_type(12));
console.log(detect_data_type('resource'));
console.log(detect_data_type(false));
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