What does it mean. => in rails

Question

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Can anyone know the meaning for the following symbol in rails?

=>

JavaScript

def update
  account = Account.find params[:id]
  permitted = params.require(:account).permit(:name, :otherparam)
  account.update_attributes permitted
  render :json => account
end

for what purpose we need to use the above expression?

I have searched it in google. but no luck.

Thanks in advance

Posted 19-Oct-15 19:06pm

priya dharshan

Updated 19-Oct-15 20:16pm

v3

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Comments

Palash Mondal_ 20-Oct-15 1:16am

where did you got the above code? doesn't look like a jQuery code?

Amit Jadli 20-Oct-15 1:40am

I think this is Ruby on Rails code..not jquery or javascript code..

priya dharshan 20-Oct-15 2:17am

sry. its actually rail snippet

Krunal Rohit 20-Oct-15 2:47am

I think you're account info would be rendered in json.

-KR

2 solutions

Solution 1

It is called a Hash Rocket. Used for creating hashes like this {key1 => value1, key2 => value2}
By the way, new style syntax (Ruby 1.9) is: {key1: value1, key2: value2}

Good luck!

Posted 19-Oct-15 21:47pm

E.F. Nijboer

Updated 19-Oct-15 21:49pm

v2

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priya dharshan · Accepted Answer · 2015-10-20T18:51:00

This is called Arrow functions.

An arrow function expression (also known as fat arrow function) has a shorter syntax compared to function expressions and lexically binds the this value. Arrow functions are always anonymous.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions/Arrow_functions[^]

This is a new technology, part of the ECMAScript 2015 (ES6) standard.
This technology's specification has been finalized, but check the compatibility table for usage and implementation status in various browsers.