v2 / vlib / builtin / lambda_expr_array_test.v
49 lines · 39 sloc · 976 bytes · 19f080ffb8f8f01976692f6b79d9f857c685e109
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1const a = [4, 5, 1, 2, 5, 9]


2


3fn test_map() {


4    assert a.map(it) == a


5    assert a.map(it * 10) == [40, 50, 10, 20, 50, 90]


6


7    assert a.map(|x| x) == a


8    assert a.map(|x| x * 10) == [40, 50, 10, 20, 50, 90]


9    assert a.map(|x| 'x: ${x}') == ['x: 4', 'x: 5', 'x: 1', 'x: 2', 'x: 5', 'x: 9']


10    assert a.map(|x| f64(x) * 10.0) == [40.0, 50.0, 10.0, 20.0, 50.0, 90.0]


11}


12


13fn test_filter() {


14    assert a.filter(it > 4) == [5, 5, 9]


15    assert a.filter(it < 4) == [1, 2]


16


17    assert a.filter(|x| x > 4) == [5, 5, 9]


18    assert a.filter(|x| x < 4) == [1, 2]


19}


20


21fn test_any() {


22    assert a.any(it > 4)


23    assert !a.any(it > 40)


24


25    assert a.any(|x| x > 4)


26    assert !a.any(|x| x > 40)


27}


28


29fn test_all() {


30    assert !a.all(it > 4)


31    assert a.all(it < 40)


32


33    assert !a.all(|x| x > 4)


34    assert a.all(|x| x < 40)


35}


36


37fn each(a []int, cb fn (x int)) {


38    for x in a {


39        cb(x)


40    }


41}


42


43fn test_using_lambda_expr_that_does_not_return_as_cb() {


44    each(a, fn (x int) {


45        println(x)


46    })


47    each(a, |x| println(x))


48    each(a, |x| dump(x))


49}


50