# Liquid filter for Rust to commafy a number (put comma after every 3 digtist from right to left)

The [liquid](https://crates.io/crates/liquid) crate, the Rust implementation of the [liquid](https://shopify.github.io/liquid/) template
system has many filters to manipulate the data in the template, but AFAIK there is no filter to commafy a number.

## Usage:

* `Cargo.toml`:

```toml
[dependencies]
liquid = "0.26"
liquid-filter-reverse-string = "0.1"
```

* `src/main.rs`:


```rust
use liquid_filter_commafy::Commafy;

fn main() {
    println!("{}", render("{{value | commafy}}", liquid::object!({ "value": "2345" })));
    println!("{}", render("{{value | commafy}}", liquid::object!({ "value": 123456 })));
}

fn render(tmpl: &str, glob: liquid::Object) -> String {
    let template = liquid::ParserBuilder::with_stdlib()
        .filter(Commafy)
        .build()
        .unwrap()
        .parse(tmpl)
        .unwrap();

    template.render(&glob).unwrap()
}
```

The important pieces:

The `use` statement:

```
use liquid_filter_commafy::Commafy;
```

The use of the `commafy` filter in the template:

```
let template = "{{value | commafy}}";
```

* adding the filter to the engine:

```rust
  .filter(Commafy)
```



## Release


* update the `version` number in `Cargo.toml`

```
cargo publish
git tag -a v0.1.0 -m v0.1.0
git push --tags
```