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added deep cmp(..)...

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Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
This commit is contained in:
Alex A. Naanou 2018-07-20 03:03:43 +03:00
parent f4f174de81
commit 28128ca3a1
1 changed files with 18 additions and 3 deletions
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21
diff.js
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@ -542,6 +542,8 @@ var Types = {
// NOTE: this will include direct links to items.
// NOTE: for format info see doc for Types...
//
// XXX might be a good idea to make a .walk(..) version of this...
// ...i.e. pass a function a nd call it with each change...
// XXX special case: empty sections do not need to be inserted...
// ...splice in a sparse array and store an Array diff with only
// length changed...
@ -952,6 +954,19 @@ Types.set('Text', {
//---------------------------------------------------------------------
// Deep-compare objects...
//
// XXX would be nice to do a fast fail version of this, i.e. fail on
// first mismatch and do not waste time compiling a full diff we
// are going to throw away anyway...
// ...this would be possible with a live .walk(..) that would
// report changes as it finds them...
var cmp =
module.cmp =
function(A, B){
return Types.diff(A, B) == null ? true : false }
// Diff interface function...
//
// This is a front-end to Types.diff(..), adding a metadata wrapper to
@ -1091,7 +1106,7 @@ var _patch = function(diff, obj){
if(type == 'item'){
// object attr...
if(typeof(key) == typeof('str')){
if(change.B.type == EMPTY.type){
if(cmp(change.B, EMPTY)){
delete target[key]
} else {
@ -1109,10 +1124,10 @@ var _patch = function(diff, obj){
} else if(j == null){
// XXX better EMPTY check -- use diff
if(!('B' in change) || change.B.type == EMPTY.type){
if(!('B' in change) || cmp(change.B, EMPTY)){
delete target[i]
} else if(!('B' in change) || change.B.type == NONE.type){
} else if(!('B' in change) || cmp(change.B, NONE)){
target.splice(i, 1)
} else {