67 lines
1.1 KiB
Markdown
67 lines
1.1 KiB
Markdown
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Other Operators
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===============
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{{#include ../links.md}}
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Compound Assignment Operators
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----------------------------
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```rust
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let number = 9;
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number += 8; // number = number + 8
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number -= 7; // number = number - 7
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number *= 6; // number = number * 6
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number /= 5; // number = number / 5
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number %= 4; // number = number % 4
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number ~= 3; // number = number ~ 3
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number <<= 2; // number = number << 2
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number >>= 1; // number = number >> 1
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number &= 0x00ff; // number = number & 0x00ff;
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number |= 0x00ff; // number = number | 0x00ff;
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number ^= 0x00ff; // number = number ^ 0x00ff;
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```
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The Flexible `+=`
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----------------
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The `+=` operator can also be used to build [strings]:
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```rust
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let my_str = "abc";
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my_str += "ABC";
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my_str += 12345;
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my_str == "abcABC12345"
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```
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It may also be used to concatenate [arrays]:
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```rust
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let my_array = [1, 2, 3];
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my_array += [4, 5];
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my_array == [1, 2, 3, 4, 5];
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```
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or mix two [object maps] together:
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```rust
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let my_obj = #{a:1, b:2};
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my_obj += #{c:3, d:4, e:5};
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my_obj.len() == 5;
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```
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