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Simple Javascript deep object comparison (shows diff)
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| # Shows in an understandable format what the diff is between two hashes. | |
| # I've only really used this for debugging purposes | |
| deepCompare = (source, destination, stack = []) -> | |
| # This relies on angular, but this line can be replaced with return if source == destination | |
| return if angular.equals(source, destination) | |
| # Object and not array | |
| if typeof source == 'object' && source.constructor != Array | |
| # invalid destination or different types | |
| if !destination? || (typeof destination != 'object' || destination.constructor == Array) | |
| console.log "#{stack} <=> source: #{source}, destination: #{destination}" | |
| return | |
| # For the case when destination has keys not in the source, since | |
| # the loop below won't catch catch this | |
| if !angular.equals(Object.keys(source), Object.keys(destination)) | |
| console.log "#{stack} <=> source: ", source, "destination:", destination | |
| console.log "(different keys)" | |
| console.log "source:", Object.keys(source) | |
| console.log "destination:", Object.keys(destination) | |
| return | |
| # We know now we have 2 objects, so compare their keys | |
| for key, elem of source | |
| newStack = JSON.parse(JSON.stringify(stack)) | |
| newStack.push("[#{key}]") | |
| deepCompare(source[key], destination[key], newStack) | |
| # Array ? | |
| else if source?.constructor == Array | |
| if destination?.constructor != Array | |
| console.log "#{stack} <=> source: #{source}, destination: #{destination}" | |
| return | |
| for elem, index in source | |
| # just a very raw way of duplicating the object | |
| newStack = JSON.parse(JSON.stringify(stack)) | |
| newStack.push("[#{index}]") | |
| deepCompare(source[index], destination[index], newStack) | |
| else | |
| console.log "#{stack} <=> source: #{source}, destination: #{destination}" |
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