javascript - how to get rid of Object #<Object> has no method 'push' error? -

hi trying push data on json object has key defined still getting uncaught typeerror @ line have alert("3") , alert("6")

 server.on('update_message_from_server', function(data){                 if(data.message_to!=false){                     alert("1");                     if(data.message_from==<?php echo $session_user_id;?>){                         alert("2");                         if(message_store.hasownproperty(data.message_to_email)){                             alert("3");                             message_store[data.message_to_email].push((data));                             str2 = '<div id ="recent_message_log_entry'+data.message_to_email+'"><div>'+data.message+'</div><div>'+data.date_posted+'</div></div>';                             $(document.getelementbyid("recent_message_log_entry"+data.message_to_email)).replacewith(str2);                         }else{                             alert("4");                             message_store[data.message_to_email]= new array();                             message_store[data.message_to_email]=data;                             string = '<div><div>'+data.message_to_email+'</div><div>'+data.message+'</div><div>'+data.date_posted+'</div></div>';                             $("#new_updates").append(string);                         }                     }else{                         alert("5");                         if(message_store.hasownproperty(data.message_from_email)){                             alert("6");                             message_store[data.message_from_email].push((data));                             str2 = '<div id ="recent_message_log_entry'+data.message_from_email+'"><div>'+data.message+'</div><div>'+data.date_posted+'</div></div>';                             $(document.getelementbyid("recent_message_log_entry"+data.message_from_email)).replacewith(str2);                         }else{                             alert("7");                             message_store[data.message_from_email]= new array();                             message_store[data.message_from_email]=data;                             string = '<div><div>'+data.message_from_email+'</div><div>'+data.message+'</div><div>'+data.date_posted+'</div></div>';                             $("#new_updates").append(string);                         }                     }                 }else{                     alert("8");                     alert("email not exist "+data.message_to_email);                 }                 alert(json.stringify(message_store));             }); 

how rectify this?

thanks in advance

if message_store[data.message_from_email] not defined, first assigning empty array it, instead of pushing data array overwriting array data

the bug in line

message_store[data.message_from_email]= new array(); message_store[data.message_from_email]=data; 

it should be

message_store[data.message_from_email] = new array(); message_store[data.message_from_email].push(data); 

or shorten

message_store[data.message_from_email]= [data]; 

so

server.on('update_message_from_server', function(data){     if(data.message_to!=false){         alert("1");         if(data.message_from==<?php echo $session_user_id;?>){             alert("2");             if(message_store.hasownproperty(data.message_to_email)){                 alert("3");                 message_store[data.message_to_email].push((data));                 str2 = '<div id ="recent_message_log_entry'+data.message_to_email+'"><div>'+data.message+'</div><div>'+data.date_posted+'</div></div>';                 $(document.getelementbyid("recent_message_log_entry"+data.message_to_email)).replacewith(str2);             }else{                 alert("4");                 message_store[data.message_from_email]=[data];                 string = '<div><div>'+data.message_to_email+'</div><div>'+data.message+'</div><div>'+data.date_posted+'</div></div>';                 $("#new_updates").append(string);             }         }else{             alert("5");             if(message_store.hasownproperty(data.message_from_email)){                 alert("6");                 message_store[data.message_from_email].push((data));                 str2 = '<div id ="recent_message_log_entry'+data.message_from_email+'"><div>'+data.message+'</div><div>'+data.date_posted+'</div></div>';                 $(document.getelementbyid("recent_message_log_entry"+data.message_from_email)).replacewith(str2);             }else{                 alert("7");                 message_store[data.message_from_email]=[data];                 string = '<div><div>'+data.message_from_email+'</div><div>'+data.message+'</div><div>'+data.date_posted+'</div></div>';                 $("#new_updates").append(string);             }         }     }else{         alert("8");         alert("email not exist "+data.message_to_email);     }     alert(json.stringify(message_store)); });