A guide on extracting key and value pairs from an object using typescript

Question

A guide on extracting key and value pairs from an object using typescript

I am trying to extract both the keys and values from an object in TypeScript. The code I have used only returns the values, without displaying the keys.

Object.keys(data).forEach(key=> {
    console.log('keys', data[key]);     
});

However, I found that using the following function in JavaScript correctly gives me both the key and value. Can someone assist me in achieving the same outcome in TypeScript?

angular.forEach(data, function (value, column) {
    columns.push(column);
    values.push(value);
  });

javascript typescript ionic2

Answer 1

Answer №1

When you access data[key], you are retrieving the corresponding value:

Object.keys(data).forEach(key => {
    console.log('key', key);     
    console.log('value', data[key]);     
});

If you wish to iterate through an object, you can also utilize the for...in loop:

for (var key in data) {
    if (data.hasOwnProperty(key)) {
        console.log('key', key);
        console.log('value', data[key]);
    }
}

Answer 2

When you access data[key], you are retrieving the corresponding value:

Object.keys(data).forEach(key => {
    console.log('key', key);     
    console.log('value', data[key]);     
});

If you wish to iterate through an object, you can also utilize the for...in loop:

for (var key in data) {
    if (data.hasOwnProperty(key)) {
        console.log('key', key);
        console.log('value', data[key]);
    }
}

A guide on extracting key and value pairs from an object using typescript

Answer №1

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