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organize the docs and some rewording

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Andrew Kelley 2019-07-16 13:13:21 -04:00
parent 475a181028
commit 23dd7f4527
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1 changed files with 22 additions and 13 deletions
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doc/langref.html.in
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@ -1731,29 +1731,38 @@ test "array initialization with function calls" {
assert(more_points[4].y == 6);
assert(more_points.len == 10);
}
{#code_end#}
{#see_also|for|Slices#}
// Multidimensional arrays are declared by simply adding another array before the existing array
var mat4x4 = [4][4]f32{
[_]f32{1.0, 0.0, 0.0, 0.0},
[_]f32{0.0, 1.0, 0.0, 1.0},
[_]f32{0.0, 0.0, 1.0, 0.0},
[_]f32{0.0, 0.0, 0.0, 1.0}
{#header_open|Multidimensional Arrays#}
<p>
Mutlidimensional arrays can be created by nesting arrays:
</p>
{#code_begin|test|multidimensional#}
const std = @import("std");
const assert = std.debug.assert;
const mat4x4 = [4][4]f32{
[_]f32{ 1.0, 0.0, 0.0, 0.0 },
[_]f32{ 0.0, 1.0, 0.0, 1.0 },
[_]f32{ 0.0, 0.0, 1.0, 0.0 },
[_]f32{ 0.0, 0.0, 0.0, 1.0 },
};
test "multidimensional arrays" {
// Multidimensional arrays can be accessed as expected from other languages...
// Access the 2D array by indexing the outer array, and then the inner array.
assert(mat4x4[1][1] == 1.0);
// or iterated over like any other array
for (mat4x4) |row, rowNum| {
for (row) |column, colNum| {
if (rowNum == colNum) {
assert(column == 1.0);
// Here we iterate with for loops.
for (mat4x4) |row, row_index| {
for (row) |cell, column_index| {
if (row_index == column_index) {
assert(cell == 1.0);
}
}
}
}
{#code_end#}
{#see_also|for|Slices#}
{#header_close#}
{#header_close#}
{#header_open|Vectors#}