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PORacket module import basics
 

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  1. PORacket module import basics
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    <p>I'm trying to <code>require</code> one file in another while working with Racket. I have two files in the same folder. They are <code>world.rkt</code> and <code>ant.rkt</code>.</p> <p><code>world.rkt</code>:</p> <pre><code>(module world racket (provide gen-grid gen-cell) (define (gen-cell item fill) (cons item fill)) (define (gen-grid x y fill) (begin (define (gen-row x fill) (cond ((&gt; x 0) (cons (gen-cell (quote none) fill) (gen-row (- x 1) fill))) ((&lt;= x 0) (quote ()) ))) (cond ((&gt; y 0) (cons (gen-row x fill) (gen-grid x (- y 1) fill))) ((&lt;= y 0) (quote ()) ))))) </code></pre> <p><code>ant.rkt</code>:</p> <pre><code>(module ant racket (require "world.rkt") (define (insert-ant grid x y) (cond ((&gt; y 0) (insert-ant (cdr grid) x (- y 1))) ((&lt; y 0) 'Error) ((= y 0) (begin (define y-line (car grid)) (define (get-x line x) (cond ((&gt; x 0) (get-x (cdr line) (- x 1))) ((&lt; x 0) 'Error) (= x 0) (gen-cell 'ant (cdr (car line))) )) (get-x y-line x)))))) </code></pre> <p>Now, I can type <code>(require "ant.rkt")</code> in the REPL, and then when I type <code>(gen-cell 'none 'white)</code> I get the error:</p> <pre><code>reference to undefined identifier: gen-cell </code></pre> <p>I've looked up documentation on imports and exports, but I can't get it to import correctly. I feel like it's something really simple that I just don't understand about the syntax.</p> <p>How should I change my code so that I can use <code>gen-grid</code> and <code>gen-cell</code> in <code>ant.rkt</code>?</p>
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    1. COmaybe you should read this: http://stackoverflow.com/questions/4809433/including-an-external-file-in-racket
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    2. CONo, that question is asking about `include` for module-less code. But in this question dbmikus is already using modules, so he's in a better starting point.
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