Replacing values in JSON object
问题 I have the following JSON object data returned from my apicontroller : > [ {"id":2,"text":"PROGRAMME","parent":null}, > {"id":3,"text":"STAGE","parent":2}, > {"id":4,"text":"INFRA","parent":2}, > {"id":5,"text":"SYSTEM","parent":3}, > {"id":6,"text":"STOCK","parent":3}, {"id":7,"text":"DPT","parent":3}, > {"id":9,"text":"EXTERNAL","parent":null} ] I want to replace "parent":null with "parent":'"#"' I have tried the code below, but it is only replacing the first occurrence of "parent":null .