> The def was for legibility (or I was going for legibility). Speaking
> of redefing, is there a way to block a redef so I or someone else
> doesn't monkey-patch a function?
You can set a validator on the Var to prevent accidents. However,
someone who really wants to redefine a function can just
> Please note that actually def'ing each value is not what you're
> supposed to do :) def is reserved for global constants and dynamically
> rebindable variables, and redefing an existing variable is considered
> bad style.
The def was for legibility (or I was going for legibility). Speaking
of r
On Mar 29, 1:26 am, strattonbrazil wrote:
> Is this the common way to do it?
>
> (def sister (assoc brother :name "Cindy"))
>
Please note that actually def'ing each value is not what you're
supposed to do :) def is reserved for global constants and dynamically
rebindable variables, and redefing
The Clojure data structures are immutable, so there's no need to copy. Just
"modify" the existing structure and you have a new immutable instance.
If you are coming from Java, it helps to think of these immutable structures
like Java's String.
On Sun, Mar 28, 2010 at 9:29 AM, strattonbrazil wrot
Is this the common way to do it?
(def sister (assoc brother :name "Cindy"))
If you want to change the value of one key in a map, yes. (In this
example it looks weird, of course.)
If you want to create a new map by taking only some values from
another map:
user=> (def sister (assoc (sele
Is this the common way to do it?
(def sister (assoc brother :name "Cindy"))
Reading up more on structs, it seems they have base keys that can't be
dissoc. Is that the main difference then between it and a hash?
On Mar 28, 2:48 pm, strattonbrazil wrote:
> I did a poor job explaining myself. S
Is there a shorter way to do this?
See my earlier message. dissoc and assoc will do what you want.
(def brother {:name "Gary" :address "..." :mother "Mary" :father
"John"})
(def sister (assoc brother :name "Cindy"))
user=> sister
{:name "Cindy", :address "...", :mother "Mary", :father "John
I did a poor job explaining myself. Sorry. I understand that copying
an immutable structure is worthless. I want a copy of a structure
except one or two specific properties. For example,
(defstruct person :name :address :mother :father)
(def brother (struct person "Gary" ...))
(def sister (st
On Sun, Mar 28, 2010 at 18:29, strattonbrazil wrote:
> This may be really basic. So much so that it's hard to find on the
> internet, but is there something like a copy constructor in clojure,
A copy-constructor is redundant in a language where values are
immutable. (Just refer to it since it ca
As for papers on the Interner on the subject of persistent data
structures, one gentle introduction might be this blog entry:
http://eclipsesource.com/blogs/2009/12/13/persistent-trees-in-git-clojure-and-couchdb-data-structure-convergence/
(with examples from several fields: git, clojure, etc.)
H
This may be really basic. So much so that it's hard to find on the
internet, but is there something like a copy constructor in clojure,
where I can copy everything in a structure except one or two keys?
Maybe something like struct-map, but fills in the other variables not
supplied by another data
This may be really basic. So much so that it's hard to find on the
internet, but is there something like a copy constructor in clojure,
where I can copy everything in a structure except one or two keys?
Maybe something like struct-map, but fills in the other variables not
supplied by another data
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