Is it possible to incorporate variables into snippets in Atom? This comes in handy with for loops for example, when you want to pre-fill spots that are about to come.
The snippets.cson entry with java as a source I would imagine. Unfortunately it is not working.
'.source.java':
'For-Loop':
'prefix': 'fori'
'body': 'for (int ${1:VAR} = $2; ${VAR} < $3; ${VAR}++) {\n\t$3\n}'
Current version of Atom can support this kind of snippet. You can just put $1 at every places you want.
'.source.coffee':
'For-Loop':
'prefix': 'fori'
'body': 'for (int ${1:i} = $2; ${1:i} < $3; ${1:i}++) {\n\t$4\n}'
This is now supported in Atom - please see the other answer for how to use it. I can't delete this answer since it is the accepted one...
The documentation for the snippets package has an example that shows how to predefine the default value for a variable:
'.source.js':
'console.log':
'prefix': 'log'
'body': 'console.log(${1:"crash"});$2'
In the above example, crash is used as the default value for the log statement, allowing you to provide your own value by overwriting the crash default.
I guess what you're asking is whether there's a way to automatically use a value you typed and then apply it to the other instances of the same placeholder. So in your example, when you're at variable $1 and type foo, that it uses foo for all other occurrences of ${VAR}, right?
That's currently not possible from what I understand. I suggest you open a feature request at the snippets package's repo, or even better take a stab at adding this functionality and then creating a pull request.
Sorry if this doesn't help you, but you asked whether there was a way of doing this with the current version of Atom. The answer seems to be No at the present time.
${1:"crash"} defaults to "crash" and not crash (ie, don't quote the default values unless you want those quotes). Also note that multiline snippets are possible using ''' and """.