You are writing simple budgeting softare. A Budget consists of a total limit, represented as a positive integer, and a dictionary of category limits, represented as a map from strings to integers. For example:
{
"total_limit": 50,
"category_limits": {
"food": 10,
"rent": 11,
"candles": 49
}
The following works in Clojure:
(keys (filter (comp odd? val) {:a 1 :b 2 :c 3}))The docstrings for keys and vals don't indicate that you can do this. Is this accidential or intentional?
I vaguely recall Alex Miller indicating at some point that this capability was deemed useful and is intentionally allowed. Yes, this is an appeal to authority, but nevertheless, it makes a fairly convincing argument.
Imagine que queremos obter nome e email de uma pessoa na API do Linkedin. Chamamos:
GET http://api.linkedin.com/v2/people/123
Teríamos como resposta:
<person uri=“urn:linkedin:v2:people/123” key=“123”>
<id>123</id>
Reid Hoffman
| True = lambda { |a,b| a } | |
| False = lambda { |a,b| b } | |
| display = lambda { |boolean| boolean['true','false']} | |
| display[True] # => "true" | |
| display[False] # => "false" | |
| And = lambda{ |b1,b2| b1[b2,b1] } | |
| Or = lambda{ |b1,b2| b1[b1,b2] } |