Clojure Parse String

Question

I have the following string

layout: default
title: Envy Labs

What i am trying to do is create map from it

layout->default 
title->"envy labs"

Is this possible to do using sequence functions or do i have to loop through each line?

Trying to get a regex to work with and failing using.


(apply hash-map (re-split #": " meta-info))

Brian Carper · Accepted Answer · 2009-09-19 05:37:02Z

4

user> (let [x "layout: default\ntitle: Envy Labs"]
        (reduce (fn [h [_ k v]] (assoc h k v))
                {}
                (re-seq #"([^:]+): (.+)(\n|$)" x)))
{"title" "Envy Labs", "layout" "default"}

answered Sep 19, 2009 at 5:37

Brian Carper

73.3k28 gold badges171 silver badges169 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Hamza Yerlikaya Over a year ago

thx that worked, but i have one questions, (fn [h [_ k v]] what does _ mean do you skip everything but the last two params? or is it just a unused var name?

Brian Carper Over a year ago

_ is a normal variable name. It's just a convention to say to human readers that it's a placeholder and you don't plan to use that variable.

Jim Downing · Accepted Answer · 2009-09-19 08:01:16Z

3

The _ is a variable name used to indicate that you don't care about the value of the variable (in this case, the whole matched string).

answered Sep 19, 2009 at 8:01

Jim Downing

1,49112 silver badges29 bronze badges

Comments

Timothy Pratley · Accepted Answer · 2009-09-19 08:12:21Z

1

I'd recommend using clojure-contrib/duck-streams/read-lines to process the lines then split the fields from there. I find this method is usually more robust to errors in the file.

answered Sep 19, 2009 at 8:12

Timothy Pratley

10.7k4 gold badges36 silver badges66 bronze badges

Collectives™ on Stack Overflow

Clojure Parse String

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

2 Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related