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Programming-Idioms

  • Pascal
  • VB
  • Lua
  • Ruby

Idiom #357 Swap elements of list

Swap the elements at indices i, j in the list items

items[i], items[j] = items[j], items[i]

classes
items.exchange(i,j);

Notice that not all list types in Pascal implement exchange though.
items[i], items[j] = items[j], items[i]
New implementation...
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items[i], items[j] = items[j], items[i]

items.exchange(i,j);
items[i], items[j] = items[j], items[i]
items.swap(i, j)
swap(items, i, j);
items[i], items[j] = items[j], items[i]
items.swap(i, j);