Currently, I worked on this homework, *i.e.* Triangle. Some code snippet for test the isosceles is as following:

```
reset_pos(idx) = idx == 0 ? 1 : idx
function is_triangle(sides)
i = 1
while i <= length(sides)
sides[i] + sides[reset_pos(mod(i+1,3))] > sides[reset_pos(mod(i+2,3))] ? i = i+1 : return false
end
return true
end
function is_isosceles(sides)
if !is_triangle(sides) return false end
i = 1
while i <= length(sides)
(sides[i] == sides[reset_pos(mod(i+1,4))]) ? return true : i=i+1 # strange thing happens here.
end
return false
end
# test
is_isosceles([1,2,2])
```

if the above code annotated is

```
(sides[i] == sides[reset_pos(mod(i+1,4))]) ? return true : i=i+1
```

The compiler warns `ERROR: LoadError: syntax: colon expected in "?" expression`

. **However**, if the above code annotated is changed into

```
!(sides[i] == sides[reset_pos(mod(i+1,4))]) ? i=i+1 : return true
```

` is_isosceles(sides)`

works normally.

I wonder if I missed something. What caused the annotated code snippet behaves wrong?

Thank you.