Array with subarray loop Javascript-CodePudding

Is it possible to create an array and loop through it in JavaScript like below?

<?php
$options = array(
    'color' => array('blue', 'yellow', 'white'), 
    'size' => array('39', '40', '41'),
);

foreach($options as $option => $values){
    echo $option.'<br>';
    foreach($values as $value){
        echo $value.' ';
    }
    echo '<br>';
}
?>

I checked the internet but I can not find a good example.

Thanks for helping!

CodePudding user response：

If I understand you correctly you want a javascript equivalent to the php code you've given?

If so, it could be achieved the following way:

let options = {
    color: ['blue', 'yellow', 'white'],
    size: [39, 40, 41]
};

for(option of Object.keys(options)) {
    console.log(option);
    
    for(value of options[option]) {
        console.log(value);
    }
}

this is not exactly the same as your php code, but the loop works in a similar way.

CodePudding user response：

Exactly

let options = {
    color: ['blue', 'yellow', 'white'],
    size: [39, 40, 41]
};

You have three ways to do this:

FOR

for (option in options) {
    console.log(option);
    var values = options[option];
    for (let i = 0, len = values.length, value = values[i]; i < len; value = values[  i]) {
        console.log(value);
    }
}

ARRAY FOREACH

for (option in options) {
    console.log(option);
    options[option].forEach(value => {
        console.log(value);
    });
}

Easiest way: jQuery

$.each(options, (option, values) => {
    console.log(option);
    $.each(values, (key, value) => {
        console.log(value);
    });
});

CodePudding user response：

Arrays in javascript have integer keys (indexes). You can use an object as you need to store string keys on the parent level and the values can be arrays as they don't have any string keys

const options = {
  color: ['blue', 'yellow', 'white'],
  size: ['39', '40', '41'],
}

Object.entries(options).forEach(([key, value]) => {
  console.log(key)
  value.forEach(el => console.log(el))
})