CODEWITHSUNDEEP
rubyarrays
napsterdsilva
napsterdsilva

Reputation: 173

Delete Elements from an Array

I have an Array that looks like below

[
[0] "The Jungle Book",
[1] {
             "error" => "NO accessor for text",
        "methodName" => "text",
    "receiverString" => "android.widget.LinearLayout{438ce3c8 V.E..... ........ 0,65-148,111 #7f0902b0 app:id/movieScoreRtLayout}",
     "receiverClass" => "android.widget.LinearLayout"
},
[2] "Bruce Reitherman, Phil Harris",
[3] "PG, 1 hr. 18 min.",
[4] {
             "error" => "NO accessor for text",
        "methodName" => "text",
    "receiverString" => "com.flixster.android.view.UnclickableRelativeLayout{42ef9d18 V.E..... ........ 0,1-1080,275}",
     "receiverClass" => "com.flixster.android.view.UnclickableRelativeLayout"
},
[5] {
             "error" => "NO accessor for text",
        "methodName" => "text",
    "receiverString" => "android.widget.ListView{43bd1548 VFED.VC. .F...... 0,0-1080,1542 #7f0901a7 app:id/lvi_listview}",
     "receiverClass" => "android.widget.ListView"
},
[6] {
             "error" => "NO accessor for text",
        "methodName" => "text",
    "receiverString" => "android.widget.FrameLayout{42eeff30 V.E..... ........ 0,0-1080,1701 #1020002 android:id/content}",
     "receiverClass" => "android.widget.FrameLayout"
},
[7] {
             "error" => "NO accessor for text",
        "methodName" => "text",
    "receiverString" => "android.widget.FrameLayout{42e57e98 V.E..... ........ 0,0-1080,1701 #1020011 android:id/tabcontent}",
     "receiverClass" => "android.widget.FrameLayout"
}

]

I want to be able to get the resultant array that contains the following:

["The Jungle Book" , "Bruce Reitherman, Phil Harris" , "PG, 1 hr. 18 min." ]

Upvotes: 0

Views: 90

Answers (2)

falsetru
falsetru

Reputation: 369444

Using Array#delete_if, you can remove non-string elements:

a = [
  "The Jungle Book",
  { "error" => "NO accessor for text", },
  "Bruce Reitherman, Phil Harris",
  "PG, 1 hr. 18 min.",
  { "error" => "NO accessor for text", },
  { "error" => "NO accessor for text", },
  { "error" => "NO accessor for text", },
  { "error" => "NO accessor for text", }
]
a.delete_if { |x| ! x.is_a? String } # OR a.delete_if { |x| x.is_a? Hash }
a
# => ["The Jungle Book", "Bruce Reitherman, Phil Harris", "PG, 1 hr. 18 min."]

Or as Arupt Rakshit commented, you can use Array#select! or Array#keep_if:

a.select! { |x| x.is_a? String }

a.keep_if { |x| x.is_a? String }

Upvotes: 1

Arup Rakshit
Arup Rakshit

Reputation: 118299

This is a correct example to use Enumerable#grep :

Returns an array of every element in enum for which Pattern === element. If the optional block is supplied, each matching element is passed to it, and the block’s result is stored in the output array.

a = [
  "The Jungle Book",
  { "error" => "NO accessor for text", },
  "Bruce Reitherman, Phil Harris",
  "PG, 1 hr. 18 min.",
  { "error" => "NO accessor for text", },
  { "error" => "NO accessor for text", },
  { "error" => "NO accessor for text", },
  { "error" => "NO accessor for text", }
]

a.grep(String)
# => ["The Jungle Book", "Bruce Reitherman, Phil Harris", "PG, 1 hr. 18 min."]

Upvotes: 3

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