diff options
Diffstat (limited to 'src/doc/book/listings/ch08-common-collections/listing-08-25')
3 files changed, 28 insertions, 0 deletions
diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.lock b/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.lock new file mode 100644 index 000000000..d3daeff7d --- /dev/null +++ b/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.lock @@ -0,0 +1,6 @@ +# This file is automatically @generated by Cargo. +# It is not intended for manual editing. +[[package]] +name = "collections" +version = "0.1.0" + diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.toml b/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.toml new file mode 100644 index 000000000..fe4959823 --- /dev/null +++ b/src/doc/book/listings/ch08-common-collections/listing-08-25/Cargo.toml @@ -0,0 +1,6 @@ +[package] +name = "collections" +version = "0.1.0" +edition = "2021" + +[dependencies] diff --git a/src/doc/book/listings/ch08-common-collections/listing-08-25/src/main.rs b/src/doc/book/listings/ch08-common-collections/listing-08-25/src/main.rs new file mode 100644 index 000000000..f3f6aa166 --- /dev/null +++ b/src/doc/book/listings/ch08-common-collections/listing-08-25/src/main.rs @@ -0,0 +1,16 @@ +fn main() { + // ANCHOR: here + use std::collections::HashMap; + + let text = "hello world wonderful world"; + + let mut map = HashMap::new(); + + for word in text.split_whitespace() { + let count = map.entry(word).or_insert(0); + *count += 1; + } + + println!("{:?}", map); + // ANCHOR_END: here +} |