Fixes and additions

[panosru]

• Fix related to typo mentioned on issue let instead of set? typo? #31
• Fix float filter so it return 0.0 instead of NaN
• improved reverse filter supports number, string and array
• Added outputUndefinedVariable flag
• Added outputUndefinedVariableWithBrackets flag
• Added options method on engine initialization

[panosru]

Example of outputUndefinedVariable and outputUndefinedVariableWithBrackets

JinJS Template (test.tpl):

Hi, {{name}}!

Initialize the engine: (jin.js):

var jinjs = require("jinjs");
    jinjs.registerExtension(".tpl");

var my_template = require("./test");
var context = { };
var result = my_template.render(context);

console.log(result);

Will output:

Hi, !

Since the name variable is undefined, we could use jinjs.outputUndefinedVariable() in order to output the variable name, so if we alter our jin.js file into this:

var jinjs = require("jinjs");
    jinjs.registerExtension(".tpl");
    jinjs.outputUndefinedVariable();

var my_template = require("./test");
var context = { };
var result = my_template.render(context);

console.log(result);

Then it will output:

Hi, name!

In case we want to output the variable name with brackets then all we have to do is this:

var jinjs = require("jinjs");
    jinjs.registerExtension(".tpl");
    jinjs.outputUndefinedVariable(true,true);

var my_template = require("./test");
var context = { };
var result = my_template.render(context);

console.log(result);

And now it will output:

Hi, {{name}}!

outputUndefinedVariable method takes two parameters, both are boolean parameters, first param is for outputUndefinedVariable and second parameter is for outputUndefinedVariableWithBrackets.

[panosru]

Options method added

---

Now instead of having multiple methods when initializing jinjs engine you have only options method which handles the rest.

For instance instead of this:

require("jinjs");
    jinjs.registerExtension(".tpl", function (txt) {
      return my_transformation_module.transform_text(txt);
    });
    jinjs.outputUndefinedVariable(true, true);

you can have this:

require("jinjs").options({
  ext : '.tpl',
  outputUndefinedVariable : true,
  outputUndefinedVariableWithBrackets : true,
  filter : function (txt) {
    return my_transformation_module.transform_text(txt);
  }
});