Suggestion: Real local variables

Question

There are few kinds of local variable: 1) sprite-scope, Like scratch2.0 2) block(group)-scope, or rootblock-scope, like closure-scope

(function () {
  var a = 1;
})()

3) statement-scope, strict local variable, like

if {
   let a = 1;
} else {
   let a = 2;
}

I think (2) is better, that makes local variable in each recursion available and more convenient than strict local variable.

function search(depth, s) {
  if (depth > 3) {
     //do something
     return;
  }
  for (var i = 0; i < 10; ++i) {
    search(depth + 1, i);
  }
}

该提问来源于开源项目：LLK/scratch-vm

Answer 1

You don't need to create a variable at the top because all the variables had declared in toolbox.They can choose local/global at that time.