I\'ve read that due to how the scope chain works in javascript, if we wish to refer to a variable V within a function F that is not declared within the F\'s scope, it is beneficial (yes in terms of pe
I think I worded that correctly... I have a model called asset which is polymorphic: class Asset < ActiveRecord::Base
Ruby\'s eval() can be like def showblock(&block) puts eval(\"i * 3\", block) end where block is the block passed into the function.
Does any language or debug tool have a way to 开发者_JAVA百科print out the scope chain for examination, so as to look at the different situations of what a scope chain contains?Firebug does for JavaSc
function b() { function a() { console.log(x); } a(); const x = 10; } const x = 20; b() If I understand lexical scoping and execution context correctly, when function a() is invoked, it should ha
加载中,请稍侯......