write-string

Create complex strings.

Output of any Golf code can be written into <string> with write-string. In between write-string and end-write-string you can write <any Golf code>. For instance you can use database queries, conditional statements etc., just as you would for any other Golf code.

SHORTCUT CODE

Note that instead of write-string you can also use a shortcut "((" (and instead of end-write-string you can use "))" ), for example here a string "fname" holds a full path of a file named "config-install.golf" under the application home directory (see directories):

get-app directory to home_dir
(( fname
@<<print-out home_dir>>/config-install.golf
))

TRIMMING

Just like with all other Golf code, every line is trimmed both on left and write, so this:

(( mystr
@Some string
))

is the same as:

(( mystr
        @Some string <whitespaces>
))

write-string (or "((") statement must always be on a line by itself (and so does end-write-string, or "))" statement). The string being built starts with the line following write-string, and ends with the line immediately prior to end-write-string.

All trailing empty lines are removed, for example:

(( mystr
        @My string
        @
        @
))

the above string would have two trailing empty lines, however they will be removed. If you want to skip trimming the trailing whitespaces, use "notrim" clause in end-write-string.

- Simple

A simple example:

set-string my_str="world"
set-string my_str1="and have a nice day too!"
write-string result_str
@Hello <<print-out my_str>> (<<print-out my_str1>>)
end-write-string
print-out result_str

The output is

Hello world (and have a nice day too!)

- Using code inside

Here is using Golf code inside write-string, including database query and conditional statements to produce different strings at run-time:

get-param selector
set-string my_str="world"
write-string result_str
    if-true selector equal "simple"
        @Hello <<print-out my_string>> (and have a nice day too!)
    else-if selector equal "database"
        run-query @db="select name from employee" output name
            @Hello <<print-out name>>
            @<br/>
        end-query
    else-if
        @No message
    end-if
end-write-string
print-out result_str

If selector variable is "simple", as in URL

https://mysite.com/<app name>/some-service?selector=simple

the result is

Hello world (and have a nice day too!)

If selector variable is "database", as in URL

https://mysite.com/<app name>/some-service?selector=database

the result may be (assuming "Linda" and "John" are the two employees selected):

Hello Linda
<br/>
Hello John
<br/>

If selector variable is anything else, as in URL

https://mysite.com/<app name>/some-service?selector=something_else

the result is

No message

- Using call-handlers calls inside

The following uses a call-handler inside write-string:

set-string result_str=""
write-string result_str
    @<<print-out "Result from other-service">> is <<call-handler "/other-service">>
end-write-string
print-out result_str

The "other-service" may be:

begin-handler /other-service public
    @"Hello from other service"
end-handler

The output:

Result from other-service is Hello from other service

- Nesting

An example to nest write-strings:

write-string str1
    @Hi!
    write-string str2
        @Hi Again!
   end-write-string
   print-out str2
end-write-string
print-out str1

The result is

Hi!
Hi Again!

Strings

concatenate-strings copy-string count-substring delete-string lower-string new-string read-split replace-string set-string split-string string-length trim-string upper-string write-string See all documentation