copy-edit viget posts

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David Eisinger
2023-10-24 20:48:09 -04:00
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title: "Convert a Ruby Method to a Lambda"
date: 2011-04-26T00:00:00+00:00
draft: false
needs_review: true
canonical_url: https://www.viget.com/articles/convert-ruby-method-to-lambda/
---
Last week I
[tweeted](https://twitter.com/#!/deisinger/status/60706017037660160):
Last week I tweeted:
> Convert a method to a lambda in Ruby: lambda(&method(:events_path)).
> OR JUST USE JAVASCRIPT.
@@ -16,14 +14,22 @@ It might not be clear what I was talking about or why it would be
useful, so allow me to elaborate. Say you've got the following bit of
Javascript:
var ytmnd = function() { alert("you're the man now " + (arguments[0] || "dog")); };
```javascript
var ytmnd = function() {
alert("you're the man now " + (arguments[0] || "dog"));
};
```
Calling `ytmnd()` gets us `you're the man now dog`, while
`ytmnd("david")` yields `you're the man now david`. Calling simply
`ytmnd` gives us a reference to the function that we're free to pass
around and call at a later time. Consider now the following Ruby code:
def ytmnd(name = "dog") puts "you're the man now #{name}" end
```ruby
def ytmnd(name = "dog")
puts "you're the man now #{name}"
end
```
First, aren't default argument values and string interpolation awesome?
Love you, Ruby. Just as with our Javascript function, calling `ytmnd()`