How to return an array in javascript?

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How to return an array in javascript?

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#1 by (1 votes)

1

I have a function to upload images and for now the imgs array is going to be global scope, but I wanted this function to return this array:

function loadImages () {
    imgs = [];
    for (var i in arguments) {
        var start = arguments[i].lastIndexOf("/") + 1;
        var end = arguments[i].indexOf(".");
        var name = arguments[i].substring(start, end);
        imgs[name] = new Image();
        imgs[name].src = arguments[i];
    }
}

javascript

asked by anonymous 28.07.2017 / 16:47

1 answer

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score 1 · Answer 1

I would like to add a few points:

function loadImages () {
    let imgs = []; // se usar let não vai alterar nenhum imgs[] fora desse escopo

    // forEach percorre um array com o intuito de gerar side-effects
    // se arguments for um array-like, tem que converter com o  Array.from()
    // mas vou assumir que não é:
    arguments.forEach(x => {
        // regex que seleciona o que estiver entre o ultimo / e . 
        var name = x.match(/(.*)\/(.*)\./).pop(); 
        imgs[name] = new Image();
        imgs[name].src = x;
    });

    return imgs; //retorna o imgs como perguntado
}