string 'properties.dimensions.length' to access hash {properties: {dimensions: {length: 23}}}

Question

JavaScript: given an array of strings:

 [\'properties.dimensions.length\', \'properties.name\']

what would be the best way to use these to vali

Answer 1

You could try something like this:

function hasProperty(obj, props) {
    if (typeof props === "string") 
        return hasProperty(obj, props.split("."));
    for(var i = 0; i < props.length; i++) {
        if (props[i] in obj) 
            obj = obj[props[i]];
        else 
            return false;
    }

    return true;
}

And call it like this:

var propPath = 'properties.dimensions.length';
console.log(hasProperty(myProperties, propPath));

Demonstration

And here's a recursive alternative:

function hasProperty(obj, props) {
    if (typeof props === "string") 
        return hasProperty(obj, props.split('.'));
    return props.length == 0 || props[0] in obj && hasProperty(obj[props.shift()], props);
}

var propPath = 'properties.dimensions.length';
console.log(hasProperty(myProperties, propPath));

Demonstration