ruby - How can I uppercase each element of an array? -


How do I change the array of elements in uppercase? The expected output will be: 

  ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"] => ["Monday", "Today", "Wednesday", "Thursday", "Friday"]   
 did the following and left them as a short case.    Day. Wax.map (& amp;: name) .each {| The_day | The_day.upcase} = & gt; ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"]    
 
 
 return a new array  
 If you want to return the uppercase array, use  #map :  
  array = ["Monday", "Tuesday", "Wednesday", "Thursday", "Friday"] # Return the upper version back to the array.map (and: up to) = & gt; ["Monday", "Thursday", "Wednesday", "Thursday", "Friday"] #Remove Unassisted Array = Array = & gt; As you can see, the original array is not modified, but you can see the upper part of [ You can use the return value from #map anywhere you can use an expression.  
 Update Array to Place  
 If you want an uppercase array, press  #map!  ; ["Monday", "Today", "Wednesday", "Thursday", "Friday"]

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