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How can i get array key-values pair using javascript [closed] - javascript

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for(i=0;i<=array_values.length;i++){
var a=array_values[i].amounts;
var t=array_values[i].Tax;
alert(a);
alert(t);
}
Error : TypeError: array_values[i] is undefined
var a=array_values[i].amounts;
var a=array_values[i].amounts;

change
for(i=0;i<=array_values.length;i++)
to
for(i=0;i<array_values.length;i++)
<= to <

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How to check if a list is not empty?
if (serialNumbersList.Any()) //c# expression equivalent
{
// do stuff
}

In javascript there are no lists but arrays, and you can check their length property
if(serialNumberList.length > 0) {
// Do your stuff
}

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onRowClick function, i am getting index id.

Try this below :
onRowClick($event) {
const indexid= $event;
this.tagPolicesArray['records'].map(function(item, index){
if(index == indexid){
console.log(item['name']); ----------------> Here you will get your required name
}
});
}

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console.log(io.sockets.clients('test1234fgdgdfgdfg'));
It gives me error :
Object # has no method 'clients'

io.sockets.clients() can no longer be used after version Socket.IO version 1.0
Here's what you should use:
for (var clientId in io.sockets.adapter.rooms[roomId]) {
var clientSocket = io.sockets.connected[clientId];
}

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Consider:
var playlist = {"bad romance":"gaga", "we cry":"the script"};
How can I get string "gaga" from my code? What is the name of my array in JavaScript programming?

Try Object instead of Array:
var playlist = {"bad romance":"gaga", "we cry":"the script"};
alert(playlist["bad romance"]); //gaga

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I have a String variable who represent date
console.log(goDate); --> "23/12/2014"
how I could turn this variable like this..?:
console.log(goDate); --> "2014-12-23".

var goDate = "23/12/2014"; // needs 2014-12-23
var newGoDate = goDate.split('/').reverse().join('-');