Array2Object: strictly return an object from an array of pairs.

Array2Object.js

function Array2Object(array){
  
  var object = {}, len = array.length;
  
  if(len % 2 !== 0) return object;
  
  for(var index = 0; index < len; index++) object[array[index]] = array[++index];
  
  return object;
  
}

mini-example.js

// minified version:
function Array2Object(a){var b=a.length,c={},d=0;if(b%2!==0)return c;for(;d<b;d++)c[a[d]]=a[++d];return c}

var someArray = [
  "array",    [123,"abc"],
  "boolean",  true,
  "function", Array2Object,
  "number",   123,
  "object",   {"123":"abc"},
  "string",   "Hello world!"
];

Array2Object(someArray);
// { array: Array[2], boolean: true, function: Array2Object(), number: 123, object: Object, string: "Hello world!" }

Looks good. There is one more https://www.npmjs.com/package/arrays-to-object :)