|Think about Loose Coupling|
Since you are overwriting the original array with the results, the simplest solution is:
Which mutates the array in-place, thus avoids constructing two lists (in and out of map) as well as 'curing' the perceived problem.
And if you wanted to create a new list from the modified values whilst retaining the original array unmodified, I'd probably do it this way also:
With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
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In the absence of evidence, opinion is indistinguishable from prejudice.