Vue源码-工具方法 /* */ //Object.freeze()阻止修改现有属性的特性和值,并阻止添加新属性. var emptyObject = Object.freeze({}); // these helpers produces better vm code in JS engines due to their // explicitness and function inlining // these helpers produces better vm code in JS en…
Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase. Example 1: Input: "Hello" Output: "hello" Example 2: Input: "here" Output: "here" Example 3: Input: "L…