Deep merge

Recursively deep merge two or more objects.

merge(Boolean isExtend, Function arrayMerge, Object firstObj, ... Object) => Object

Return the merged object.

• If isExtend is true, the content of following objects are merged to the first object.
• arrayMerge function determined how array is merged. By default, object value is merged and primative value is replaced based on position.
• firstObj - The first object to merge.
• {...Object} - Object(s) to merge into the previous one.