Re: How to assign a variable to an evaluated string

Yes, you're right, the comma needs to be inside the <#if>. I hadn't realized that FreeMarker split() will create a final empty array item if the string ends in the delimiter, since that's counter to the behavior of a lot of programming languages (though it is explained in the doc). Another approach is to strip off a string-final delimiter before doing the split, in order to tolerate error on the part of the template authors.



From: "Daniels, Troy (US SSA)" <[email protected]>
Subject: Re: [FreeMarker-user] How to assign a variable to an
        evaluated       string
To: FreeMarker-user <[email protected]>
Message-ID:
        <mailman.365990.1273603460.8007.freemarker-user@lists.sourceforge.net>
Content-Type: text/plain; charset="us-ascii"



________________________________
From: Rebecca Younes [mailto:[email protected]]
Sent: Monday, May 10, 2010 1:30 PM
To: [email protected]
Subject: [FreeMarker-user] How to assign a variable to an evaluated string

Consider this template code:


<#assign useOranges=false>
<#assign fruit>
    apples,
    bananas,
    <#if useOranges>
        oranges
    </#if>
</#assign>
<#assign arr=fruit?split(",")>
${arr?size}<br />
${fruit}

Your second comma is outside the #if, so I think you will always get three elements, although the last one might be empty.  Have you tried

<#assign fruit>
    apples,
    bananas
    <#if useOranges>
         ,  oranges
    </#if>
</#assign>

which wyould give you apples, bananas without the trailing comma.

Troy



This outputs:
3
apples, bananas,

What I want is for ${arr?size} to print 2 rather than 3: i.e., for the contents of fruit to be evaluated before assigning it to arr. I've tried adding:

<#assign fruit2>${fruit}</#assign>
<#assign arr=fruit2?split(",")>

I also tried the eval built-in:

<#assign fruit2>${fruit?eval}</#assign>
<#assign arr=fruit2?split(",")>

Neither of these produce the desired output. Is there a way to do this in FreeMarker?

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