⍝ Matrix search/replace:

    ssmat(2 12⍴'Is you is oris you aint?')'is' 'was'
Is you was or
was you aint?

    nmat←3 5⍴1 to 15                        ⍝ numeric matrix

    ssmat nmat (7 8 9) (70 80 90)           ⍝ Numeric replacement
 1  2  3  4  5
 6 70 80 90 10
11 12 13 14 15

    ssmat nmat (7 8 9) 'repl'               ⍝ Replace with longer string
 1  2  3  4  5  0
 6  r  e  p  l 10
11 12 13 14 15  0

    ssmat nmat (7 8 9) 'r'                  ⍝ Replace with shorter string
 1  2  3  4  5
 6  r 10  0  0
11 12 13 14 15

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