Handling create, update, and destroy for sync

Question

I'm pretty sure there's a way to make this "3 times" duplicated code into only one. Any idea how to do this?

if (typeof sync.create!='undefined') {
 for (var i = 0; i <sync.create.length; i++) {
 sync.create[i].modified.id_partenaire=false;
 }; 
} 
if (typeof sync.update!='undefined') {
 for (var i = 0; i <sync.update.length; i++) {
 sync.update[i].modified.id_partenaire=false;
 }; 
} 
if (typeof sync.destroy!='undefined') {
 for (var i = 0; i <sync.destroy.length; i++) {
 sync.destroy[i].modified.id_partenaire=false;
 }; 
} 

Answer 1

If this should be executed on all properties of sync in general, i'd go with a for..in loop.

for(var prop in sync){
 if(sync.hasOwnProperty(prop) && typeof sync[prop] !== 'undefined'){
 var i=0, l = sync[prop].length;
 for (i; i < l; i+=1) {
 sync[prop][i].modified.id_partenaire=false;
 };
 }
}

Otherwise, if there are more properties and this should only be applied to these 3, Esailija's answer works better.

• Olivier Pons: I didn't want on all properties, but thank you very much for you suggestion, this may help for other object / properties manipulations in the future.