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describe "slicing", ->
it "should slice array with basic syntax", ->
items = [1, 2, 3, 4, 5]
result = items[1..3]
assert.same result, {1, 2, 3}
it "should slice from beginning", ->
items = [1, 2, 3, 4, 5]
result = items[1..#items]
assert.same result, {1, 2, 3, 4, 5}
it "should slice to end", ->
items = [1, 2, 3, 4, 5]
result = items[3..5]
assert.same result, {3, 4, 5}
it "should handle negative indices", ->
items = [1, 2, 3, 4, 5]
result = items[#items-2..#items]
assert.same result, {3, 4, 5}
it "should slice single element", ->
items = [1, 2, 3, 4, 5]
result = items[2..2]
assert.same result, {2}
it "should work with strings", ->
s = "hello"
result = s\sub 1, 3
assert.same result, "hel"
it "should handle out of bounds", ->
items = [1, 2, 3]
result = items[1..10]
assert.same result, {1, 2, 3}
it "should create new table", ->
original = [1, 2, 3, 4, 5]
sliced = original[2..4]
sliced[1] = 99
assert.same original[2], 2 -- original unchanged
it "should work with nested arrays", ->
nested = [[1, 2], [3, 4], [5, 6]]
result = nested[1..2]
assert.same result, {{1, 2}, {3, 4}}
it "should slice with step simulation", ->
items = [1, 2, 3, 4, 5]
result = [items[i] for i = 1, #items, 2]
assert.same result, {1, 3, 5}
it "should handle empty slice range", ->
items = [1, 2, 3, 4, 5]
result = items[6..10]
assert.same result, nil
it "should work with reverse indexing", ->
items = [1, 2, 3, 4, 5]
last = items[#]
second_last = items[#-1]
assert.same last, 5
assert.same second_last, 4
it "should support slice in assignment", ->
items = [1, 2, 3, 4, 5]
[a, b, c] = [items[i] for i in *{1, 2, 3}]
assert.same a, 1
assert.same b, 2
assert.same c, 3
it "should work with table comprehensions", ->
items = [1, 2, 3, 4, 5]
result = {i, items[i] for i = 2, 4}
assert.same result[2], 2
assert.same result[3], 3
assert.same result[4], 4
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