node.js - How to delete a info with ID from JSON based data -

-

the content of json file is: retails.json file.actually retails database.i converted json file sql database.so in json file, want delete person information single id.how can do? using node.js , express. 

{ "categories" : [ { "dept_id" : "123", "category_name" : "database", "category_discription" : "list of database", "current time" : "2016-07-21 06:27:17", "id" : "1" }, { "dept_id" : "1234", "category_name" : "debugging", "category_discription" : "program debugger", "current time" : "2016-07-21 06:32:24", "id": "2" }, { "dept_id" : "12345", "category_name" : "system analyzer", "category_discription" : null, "current time" : "2016-07-21 06:33:23", "id" : "3" } ], "departments" : [ { "name" : "manpreet singh", "address_info" : "qadian", "current time" : null, "id" : "1" }, { "name" : "tushal gupta", "address_info" : "amritsar", "current time" : "2016-07-21 06:10:14", "id" : "2" }, { "name" : "haroop singh", "address_info" : "amritsar", "current time" : "2016-07-21 06:11:12", "id" : "3" } ],  "digital_marketing" : [ { "dept_id" : "123", "phone" : "99889988", "mobile" : null, "email" : "thbs@gmail.com", "web" : null, "facebook" : null, "twitter" : null, "linkedin" : null, "current time" : "2016-07-21 06:10:16", "id" : "1" }, { "dept_id" : "1234", "phone" : "998899888", "mobile" : null, "email" : null, "web" : null, "facebook" : "gtudgal@fb.com", "twitter" : "tushalgupta", "linkedin" : null, "current time" : "2016-07-21 06:30:19", "id" : "2" }, { "dept_id" : "12345", "phone" : "99889877", "mobile" : null, "email" : "fhdts@mail.com", "web" : null, "facebook":"sdfh33@fb.com", "twitter" : null, "linkedin" : null, "current time" : "2016-07-21 06:30:13", "id" : "3"   }  ] }

i using delete id, not work:

var id = 2; app.get('/deleteuser', function (req, res) {    // first read existing users.   fs.readfile( __dirname + "/" + "retails.json", 'utf8', function (err, data) {        data = json.parse( data );        delete data["categories" + 2];             console.log( data );      res.end( json.stringify(data));    }); }); 

for (var prop in jsonobj.categories){    delete jsonobj.categories[prop].id; }

similar digital_marketing etc. jsonobj data in case..


Comments

Post a Comment

Popular posts from this blog

Spring Boot + JPA + Hibernate: Unable to locate persister -

-
i trying work entity inside request method of spring boot application. entity in project , pom.xml has dependencies it. why error message?: org.hibernate.unknownentitytypeexception: unable locate persister: com.ric.bill.model.bs.par package com.ric.web; import java.util.concurrent.atomic.atomiclong; import javax.persistence.entitymanager; import javax.persistence.persistencecontext; import net.sf.ehcache.cachemanager; import net.sf.ehcache.management.cache; import net.sf.ehcache.management.cachestatistics; import org.hibernate.stat.statistics; import org.springframework.beans.factory.annotation.autowired; import org.springframework.boot.autoconfigure.domain.entityscan; import org.springframework.cache.annotation.enablecaching; import org.springframework.transaction.annotation.enabletransactionmanagement; import org.springframework.transaction.annotation.propagation; import org.springframework.transaction.annotation.transactional; import org.springframework.web.bind.annotati
Read more

go - Golang: panic: runtime error: invalid memory address or nil pointer dereference using bufio.Scanner -

-
i implementing go program uses bufio.scanner , bufio.writer have packaged code follows package main import ( "fmt" "player/command" "strings" ) func main() { //enter code here. read input stdin. print output stdout commands.scanner.scan() { //scan new line , send comand variable check command exist or not input := strings.split(strings.trim(commands.scanner.text(), " "), " ") command := input[0] if command == "" { fmt.printf("$ %s:", commands.pwd) continue } if !commands.commands[command] { commands.throwerror("cannot recognize input.") } else { commands.execute(command, input[1:], nil) } fmt.printf("$ %s:", commands.pwd) } } i using init.go file in main package follows package main import ( "flag" "player/sourc
Read more

c - double free or corruption (fasttop) -

-
this code reads null terminated string file (file containing null terminated strings & should provide index wanted string). error: *** error in `./main': double free or corruption (fasttop): 0x090a4a80 *** aborted code: char *tmp_realloc=null; char *sstring=null; int i=1; /*set file pointer point string*/ fseek(fh,index,seek_set); sstring=(char*)malloc(sizeof(char)); if(sstring == null) return null; tmp_realloc=sstring; while( (*(sstring+i-1)=(char)fgetc((file*)fh)) != 0x0 ) { /*reallocate more memory*/ tmp_realloc=(char*)realloc((char*)sstring,++i); /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strcpy((char*)tmp_realloc,(char*)sstring); free(sstring); sstring=tmp_realloc; } } could tell me pointer causing issue (& reason) ? remove part /*if not same address copy old new & set old point new*/ if(tmp_realloc != sstring){ strc
Read more