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Jonathan
Jonathan

Reputation: 705

How does one use lambdas on the mustache.js demo page?

I have been trying for about an hour to get a lambda to work with the mustache.js demo. Nearly all of the examples online which demonstrate lambdas, do so by declaring the json inline with their js.
I've tried the following JSON:

{
  "planet": "The be the name",
  "lambda": "function() {return \"{{planet}}\"}"
}

with the following mustache:

{{lambda}}

.. with no success. Is there a way to use the mustache demo page to demonstrate lambdas?

I appreciate any help.

Upvotes: 1

Views: 5060

Answers (3)

Pere
Pere

Reputation: 1075

I declare my lambda in my js code. After I've catched the JSON from server and put it in myVar, I do something like the following, prior to calling Mustache.render:

myVar.myLambda = function(text,render) {
    return '<b>'+render(text)+'<b>';
}

render renders the mustache variable passed in brackets, which is the text parameter for the lambda function, and you should pass it in your HTML like this:

<div class="blah"><p>The planet is: {{#myLambda}}{{planet}}{{/myLambda}}</p></div>

Upvotes: 1

bobthecow
bobthecow

Reputation: 5117

One does not. It's not possible to represent a lambda as JSON. Your example is just two strings, one of which happens to be a function if you eval() it. This would work:

{
    "planet": "World",
    "lambda": function() { return "{{planet}}" }
}

... except that it's invalid JSON so it won't :(

Upvotes: 1

arnorhs
arnorhs

Reputation: 10429

It looks like lambdas are not supported on the demo page even though they work using the library normally. Probably an oversight, but I could be wrong.

Upvotes: 1

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