var albumInfo = {
2548: {
title: 'Slippery When Wet',
singer: 'Bon Jovi',
songs: ['Let It Rock', 'You Give Love a Bad Name']
},
2468: {
title: '1999',
singer: 'Prince',
songs: ['1999', 'Little Red Corvette']
}
};
console.log(albumInfo[2548])Encountering an issue with this line of code:
console.log(albumInfo.2548)
MDN has an informative page dedicated to Working with objects where the emphasis is on proper usage of property names:
An object property in JavaScript must adhere to certain rules, such as being a valid identifier without spaces or hyphens. If a property name does not meet these criteria, it can only be accessed using square bracket notation. This method is particularly handy for situations where property names are determined dynamically at runtime.
In JavaScript, objects have the ability to use keys as strings, which are then converted with coercion.
var object = {
.12e3: 'wut'
};
object[.12e3]; // 'wut'
object['.12e3']; // undefined
object['120']; // 'wut'
To work with numeric values, it is recommended to use maps instead of objects. Learn more about maps here.
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