Largest int from concatenated ints: Difference between revisions

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=={{header|J}}==
=={{header|J}}==
Here we use the "pad the integers to the same size by repeating the digits then sort using these repeated integers as a sort key" approach:
'''Solution:'''
'''Solution:'''
<lang j>maxlen=: [: >./ #&>
<lang j>maxlen=: [: >./ #&>