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If this boolean benefit is “Bogus”, nevertheless, we nevertheless don’t know if X
Let’s Look into some parameters handed into your forEach() callback function. These parameters incorporate The present price, array index, and likewise the array alone.
As a result, in this instance, considering that x just isn't outlined from the interior function, the scope from the outer operate is looked for an outlined variable x, which is discovered to have a value of one.
// → 2 Note that Despite the fact that obj just isn't an array, the method press effectively incremented obj's duration house much like if we were being working with an real array.
And since neither foo nor bar defines its own custom made toString() process, they each use precisely the same default implementation. That implementation simply just generates the literal string “[object Object]” when it can be invoked. With this clarification in your mind, Enable’s re-study the code snippet over, but this time with explanatory responses together the way:
up vote seventy eight down vote I examined this in Firefox with Firebug employing code similar to this: