Helper function for printing potentially long arrays.
(array: &A, f: &mut std::fmt::Formatter, print_item: F)
| 1044 | |
| 1045 | /// Helper function for printing potentially long arrays. |
| 1046 | fn print_long_array<A, F>(array: &A, f: &mut std::fmt::Formatter, print_item: F) -> std::fmt::Result |
| 1047 | where |
| 1048 | A: Array, |
| 1049 | F: Fn(&A, usize, &mut std::fmt::Formatter) -> std::fmt::Result, |
| 1050 | { |
| 1051 | let head = std::cmp::min(10, array.len()); |
| 1052 | |
| 1053 | for i in 0..head { |
| 1054 | if array.is_null(i) { |
| 1055 | writeln!(f, " null,")?; |
| 1056 | } else { |
| 1057 | write!(f, " ")?; |
| 1058 | print_item(array, i, f)?; |
| 1059 | writeln!(f, ",")?; |
| 1060 | } |
| 1061 | } |
| 1062 | if array.len() > 10 { |
| 1063 | if array.len() > 20 { |
| 1064 | writeln!(f, " ...{} elements...,", array.len() - 20)?; |
| 1065 | } |
| 1066 | |
| 1067 | let tail = std::cmp::max(head, array.len() - 10); |
| 1068 | |
| 1069 | for i in tail..array.len() { |
| 1070 | if array.is_null(i) { |
| 1071 | writeln!(f, " null,")?; |
| 1072 | } else { |
| 1073 | write!(f, " ")?; |
| 1074 | print_item(array, i, f)?; |
| 1075 | writeln!(f, ",")?; |
| 1076 | } |
| 1077 | } |
| 1078 | } |
| 1079 | Ok(()) |
| 1080 | } |
| 1081 | |
| 1082 | #[cfg(test)] |
| 1083 | mod tests { |