Javascript each item must have at least three categorical attributes and at least one numeric attribute....

Question

Question

Javascript each item must have at least three categorical attributes and at least one numeric attribute....

Javascript

each item must have at least three categorical attributes and at least one numeric attribute. Attributes such as ID, name etc do not count as categorical or numeric attributes.

Exercise 1

(a) Define a class for your item that meets the above three categorical and one numeric attribute requirements.

(b) Create a text file that contains at least 5 such records in CSV format.

(c) Create a HTML page that contains a table element the shows one item record (hardcoded in the HTML).

(d) Add a script element into your HTML page that prints ‘hello’ to the browser’s JavaScript developer console.

(e) Add JavaScript code that uses ‘fetch’ into your HTML page that loads your item text file. Use a python initiated local server to serve that text file.

Exercise 2

Write a function that counts the number of values each item attribute has. This is effectively a group-by on the item table for each column.

For example: if the first attribute is colour, and its values are [ ‘red’, ‘black’, ‘white’, ‘black’, ‘red’ ], the counts for colour would be:

red 2 black 2 white 1

engineering Computer-Science

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Answer 1

Answer #1

Author: Rishabh Jain

Date:08/09/2019

<html>

<body>

<table>

<tr>

<th>Industry Type</th>

<th>Occupational Safety and Health</th>

<th>Sources of Hazards</th>

<th>Scale of Workers</th>

</tr>

<tr>

<td>Chemical</td>

<td>General</td>

</tr>

</table>

console.log("Hello");

url='' //enter your url

let response = fetch(url);

if (response.ok) { // if HTTP-status is 200-299
// get the response body (the method explained below)
let json = response.json();
} else {
alert("HTTP-Error: " + response.status);
}
console.log(response)

</script>

</body>

</html>

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

Exercise 2:

<html>

<head>

</head>

<body>

function count_value( arr ){

const map = arr.reduce((acc, e) => acc.set(e, acc.get(e) + 1 || 1), new Map());

//console.info(...map.values())

console.info(...map.entries())

}

var array=[ "red", "black", "white","black", "red" ];

count_value(array);

//output is ["red", 2] ["black", 2] ["white", 1]

</script>

</body>

</html>

Add a comment

Answer 2

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