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rust-boxed-str: fix hello length 5

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This commit is contained in:
Mahdi Dibaiee 2022-10-15 18:25:26 +01:00
parent 5d87619783
commit 8987d46eb9
1 changed files with 4 additions and 4 deletions
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8
_posts/2022-06-16-rust-boxed-str-vs-string.md
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@ -238,10 +238,10 @@ char` is represented using `u8` in Rust, so in Rust terminology the type is
0x000000016fdfed78: (unsigned char *) pointer = 0x0000600000004010
0x000000016fdfed78: (core::marker::PhantomData<unsigned char>) _marker = {}
}
0x000000016fdfed80: (unsigned long) cap = 6
0x000000016fdfed80: (unsigned long) cap = 5
0x000000016fdfed78: (alloc::alloc::Global) alloc = {}
}
0x000000016fdfed88: (unsigned long) len = 6
0x000000016fdfed88: (unsigned long) len = 5
}
}
```
@ -249,8 +249,8 @@ char` is represented using `u8` in Rust, so in Rust terminology the type is
Ah! I see the `ptr` field of `RawVec` with a value of `0x0000600000004010`, that
is the memory address of the beginning of our string (namely the `h` of our
`hello`)! There is also `cap` and `len`, which respectively stand for capacity
and length, with the value 6, indicating that our string is of capacity and
length 6; the difference between the two being that [you can have a `Vec` with a
and length, with the value 5, indicating that our string is of capacity and
length 5; the difference between the two being that [you can have a `Vec` with a
capacity of 10 while it has zero
items](https://doc.rust-lang.org/nightly/std/vec/struct.Vec.html#capacity-and-reallocation),
this would allow you to append 10 items to the `Vec` without having a new