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Fix op-assignment overrides.

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This commit is contained in:
Stephen Chung
2020-09-21 16:15:52 +08:00
parent 748d4d2f36
commit 83f9df2852
6 changed files with 61 additions and 32 deletions
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10
doc/src/language/arrays.md
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@@ -33,7 +33,9 @@ The following methods (mostly defined in the [`BasicArrayPackage`][packages] but
| Function | Parameter(s) | Description |
| ------------------------- | --------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
| `push` | element to insert | inserts an element at the end |
| `+=` operator, `append` | array to append | concatenates the second array to the end of the first |
| `+=` operator | array, element to insert (not another array) | inserts an element at the end |
| `append` | array to append | concatenates the second array to the end of the first |
| `+=` operator | array, array to append | concatenates the second array to the end of the first |
| `+` operator | first array, second array | concatenates the first array with the second |
| `insert` | element to insert, position<br/>(beginning if <= 0, end if >= length) | insert an element at a certain index |
| `pop` | _none_ | removes the last element and returns it ([`()`] if empty) |
@@ -49,7 +51,9 @@ Use Custom Types With Arrays
---------------------------
To use a [custom type] with arrays, a number of array functions need to be manually implemented,
in particular `push`, `pad` and the `==` operator (in order to support the `in` operator).
in particular `push`, `pad` and the `+=` operator. In addition, the `==` operator must be
implemented for the [custom type] in order to support the `in` operator which uses `==` to
compare elements.
See the section on [custom types] for more details.
@@ -104,7 +108,7 @@ let foo = y[0];
foo == 1;
y.push(4); // 4 elements
y.push(5); // 5 elements
y += 5; // 5 elements
y.len == 5;