Skip to content

Instantly share code, notes, and snippets.

Embed
What would you like to do?
Color Hashing: Generate a hex color out of a given string. This works in Node and in the browser
hashFnv32a = (str, asString, seed) ->
#jshint bitwise:false
i = undefined
l = undefined
hval = (if (seed is `undefined`) then 0x811c9dc5 else seed)
i = 0
l = str.length
while i < l
hval ^= str.charCodeAt(i)
hval += (hval << 1) + (hval << 4) + (hval << 7) + (hval << 8) + (hval << 24)
i++
# Convert to 8 digit hex string
return ("0000000" + (hval >>> 0).toString(16)).substr(-8) if asString
return hval >>> 0
#colorHash = _.memoize ( str )-> # It makes sense to memorize/cache the result
colorHash = ( str )->
hash = hashFnv32a(str)
r = (hash & 0xFF0000) >> 16
g = (hash & 0x00FF00) >> 8
b = hash & 0x0000FF
return "#" + ("0" + r.toString(16)).substr(-2) + ("0" + g.toString(16)).substr(-2) + ("0" + b.toString(16)).substr(-2)
colorHash( "abc" )
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment