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  1. function getType(data) {
  2.     //получили строку вида "[Object Type]"
  3.     var type = Object.prototype.toString.call(data);
  4.     //оставили только "Type"
  5.     type = type.slice(8, -1);
  6.     //перевели в нижний регистр первый символ
  7.     type = type[0].toLowerCase() + type.slice(1);
  8.     /*
  9.      * здесь используем typeOf, потому что
  10.      * toString.call() возвращает
  11.      * для arguments значение не "object",
  12.        а "arguments"
  13.      */
  14.     if (typeof data == "object" && data.length > 0) {
  15.         type = "array-like";
  16.     }
  17.     return type;
  18. }
  19.  
  20. console.log(getType(13));
  21. console.log(getType("I'm a string"));
  22. console.log(getType([1, 2, 3]));
  23. console.log(getType(true));
  24. console.log(getType(undefined));
  25. console.log(getType(function() {var x = 2 + 2; }));
  26. console.log(getType({foo: 1, bar: 2}));
  27.  
  28. function getArguments(x, y) {
  29.     return arguments;
  30. }
  31. var args = getArguments(1, 3);
  32.  
  33. console.log(getType(args));
  34.  
Success #stdin #stdout 0.06s 20312KB
comments (?)
stdin 
Standard input is empty
stdout 
number
string
array-like
boolean
undefined
function
object
array-like
https://ideone.com/QQnfE5
js 14
language:
Node.js (node 20.14)
created:
8 years ago
visibility:
public

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