Hi,
> On Oct 16, 2016, at 10:41 AM, CodeDmitry <dimamakh...@gmail.com> wrote:
>
> I was actually curious about this in Ruby as well, since Ruby also doesn't
> have the Smalltalk message syntax.
>
> I figure that the magic behind it is that Smalltalk takes strings like "dict
> at: 'foo' put: 'bar'" and evaluates them into a JavaScript equivalent of
> "dict['at:put:']('foo', 'bar')”.
There is no magic. This is how the syntax is. Instead of parentheses that
accumulate all parameters in a single place like:
x.atput(a,b);
we can insert the argument inside the message name, like:
x at: a put: b.
It’s not magic, is just different. That’s all. Except that one makes it
possible to write code that resembles natural language.
Doru
> Basically, my proof of concept(I cheated with regex to cut time):
>
> 'use strict';
>
> var Dictionary = function Dictionary() {
> this.dict = {};
> };
> Dictionary.prototype['at:put:'] = function(index, value) {
> this.dict[index] = value;
> };
> Object.defineProperty(Dictionary, 'new', {
> get: function () {
> return new this;
> }
> });
>
> function st_eval(str) {
> var x = str.match(/(dict)\s+(at):\s+'(foo)'\s+(put):\s+'(bar)'/);
> var target = x[1];
> var callName = x[2] + ':' + x[4] + ':';
> var argv = [x[3], x[5]];
> var realTarget = eval(target);
> realTarget[callName].apply(realTarget, argv);
> }
>
> var dict = Dictionary.new;
> console.log(dict);
> //dict['at:put:']('foo', 'bar');
> console.log(dict);
> st_eval("dict at: 'foo' put: 'bar'");
> console.log(dict);
>
>
>
>
>
> --
> View this message in context:
> http://forum.world.st/How-do-Smalltalk-disambiguate-messages-tp4918946p4918957.html
> Sent from the Pharo Smalltalk Users mailing list archive at Nabble.com.
>
--
www.tudorgirba.com
www.feenk.com
“The smaller and more pervasive the hardware becomes, the more physical the
software gets."
