proto

In Google Chrom's javascript, objects have a property named __proto__ that points to their prototype (or parent) object. var foo = {}; console.log(foo.__proto__ === Object.prototype); //returns true However, this is not true for the Object object. console.log(Object.__proto__ === Object.prototype); //returns false The Object.__proto__ property appears to be an empty method > console.log(Object.__proto__.toString()); function () {} Beyond serving as a warning story about relying on javascript features that start outside standard bodies -- what is the Object.__proto__ function? The top of the

I am playing with Typescript and trying to understand the compiled Javascript code generated by the compiler Typescript code: class A { } class B extends A { } Generated Javascript code: var __extends = (this && this.__extends) || (function () { var extendStatics = Object.setPrototypeOf || ({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) || function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; }; return function (d, b) { extendStatics(d, b); function __() { this.constructor = d; } d.prototype = b === null ? Object.create(b) : (__.prototype = b

As part of an effort to remove a specific geom from a plot I've already created (SO link here ), I'd like to dynamically determine the geom type of each layer of a ggplot2 object. Assuming I don't know the order in which I added layers, is there a way to dynamically find layers with a specific geom? If I print out the layers like I do below I can see that the layers are stored in a list, but I can't seem to access the geom type. library(ggplot2) dat <- data.frame(x=1:3, y=1:3, ymin=0:2, ymax=2:4) p <- ggplot(dat, aes(x=x, y=y)) + geom_ribbon(aes(ymin=ymin, ymax=ymax), alpha=0.3) + geom_line()