hexo-generator/node_modules/dom-walk/index.js

var slice = Array.prototype.slice

module.exports = iterativelyWalk

function iterativelyWalk(nodes, cb) {
    if (!('length' in nodes)) {
        nodes = [nodes]
    }
    
    nodes = slice.call(nodes)

    while(nodes.length) {
        var node = nodes.shift(),
            ret = cb(node)

        if (ret) {
            return ret
        }

        if (node.childNodes && node.childNodes.length) {
            nodes = slice.call(node.childNodes).concat(nodes)
        }
    }
}