Get object value error Cannot use 'in' operator to search for' length' in

var s = {
    "a":[{
        "name":"...",
        "dec":".."
    }],
    "b":[{
        "name":"...",
        "dec":".."
    }]  
}

$("-sharpid").click(function(){   
    show("a")
})

function show(key){
    $.each(s+"."+key, function(i,e) {
          ....
    });
}

as above ~ console.log (s.a);
normal output
parameter transfer is incorrect
Cannot use "in" operator to search for" length" in [object Object] .a
solution

Javascript
Jul.06,2022

well, that's not how it works.
you should want to s.a this call
s+'.'+key has several problems:

1. s is converted to a string [object Object]
2. The key you passed in is the variable a , not the string 'a'
3. Even if the string 'a' is passed in, the final result is [object Object] .a
4. Even if s uses the string 's.a' the last one is just a string, you need eval (' s.a') to compile

. 
s['a']//

var key = 'a'
s[key]//

function show(key){
    $.each(s[key], function(i,e) {
          ....
    });
}
show('a')
There are two forms of

dot syntax: 

1.obj.name
2.obj['name']

your problem appears in $.each (). Click on the console to enter and report an error in the each method
hoping to help

Previous: How does CPP manage the life cycle of callback returned by bind?

Next: Which one can I use vue txt loader?

css mysql arrays josn react html typescript webpack npm sass R objective-c .net sql-server jquery python-3.x angularjs django angular excel regex iphone ajax linux xml pandas vba spring database wordpress string wpf xcode windows bash postgresql oracle multithreading eclipse list firebase algorithm macos forms image scala visual-studio azure bootstrap spring-boot react-native python-2.7 docker performance function winforms matlab powershell apache dataframe api sqlite numpy rest shell selenium flutter dart maven loops qt swing android-studio csv express file class tensorflow sorting codeigniter perl
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1c119f3-559e6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1c119f3-559e6.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?