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Overview
Comment: | jfjkakljahdjhkjh |
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Downloads: | Tarball | ZIP archive | SQL archive |
Timelines: | family | ancestors | trunk |
Files: | files | file ages | folders |
SHA3-256: |
32b0e979b14cc0a26550081258f3f769 |
User & Date: | lexi 2019-05-25 06:57:06 |
Context
2019-05-25
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06:57 | jfjkakljahdjhkjh Leaf check-in: 32b0e979b1 user: lexi tags: trunk | |
06:56 | fdhjkashflksdh docs dfhjkadsklf check-in: bc95a35c86 user: lexi tags: trunk | |
Changes
Changes to README.md.
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there are three special forms that allow us to embed scheme code that is evaluated when the scml is translated to html. the simplest form is `(% …)` which will execute arbitrary scheme code. this code can mutate the execution environment, but its output will be ignored. a good use for this form is to define functions or globals (% (define page-title "index") (define path '(root list index)) (define (emit-form target prompt) `((form (action . ,target) (method . "POST")) (div ,prompt "? " (- input (type . "text") (name . "field")) (- input (type . "submit")))))) the next form, `(@ …)` is designed to make it as easy as possibly to use scheme functions from within the template body. simply write a normal scheme function call but with the atom `@` preceding the function name to dump its result into the page. the following example uses the defined functions to succinctly generate multiple simple forms. (note that `(% …)` can be implemented in terms of `(@ …)` as `(@ begin … '())`) (- !doctype html) (html (head (title "form example")) (body (p "here is a form") (@ emit-form "/cgi-bin/submit.pl" |
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55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 |
there are three special forms that allow us to embed scheme code that is evaluated when the scml is translated to html. the simplest form is `(% …)` which will execute arbitrary scheme code. this code can mutate the execution environment, but its output will be ignored. a good use for this form is to define functions or globals (% (define page-title "index") (define path '(root list index)) (define (emit-form target prompt) `((form (action . ,target) (method . "POST")) (div ,prompt "? " (- input (type . "text") (name . "field")) (- input (type . "submit")))))) the next form, `(@ …)` is designed to make it as easy as possibly to use scheme functions from within the template body. simply write a normal scheme function call but with the atom `@` preceding the function name to dump its result into the page. the following example uses the defined functions to succinctly generate multiple simple forms. (note that `(% …)` can be implemented in terms of `(@ …)` as `(@ begin … '())`) (- !doctype html) (html (head (title "form example")) (body (p "here is a form") (@ emit-form "/cgi-bin/submit.pl" |