javascript – What's the meaning "Typeerror can not read the property" 0 "undefined"?

var previousDataRange = ss2.getRange (5,1, lastRow, 8);

previousDataRange.clear ();

var data = ss.getRange (3.1, lastRow-1.8) .getValues ​​();

var currentRow = ss2.getLastRow () + 1;

for (var a = 0; a <= data.length; a ++) {

for (var b = 0; b <= 7; b ++) {// 8 columns

var cellValue = data[a][b]; // I have the error "typeerror can not read the property" 0 undefined "here

ss2.getRange (currentRow, b + 1) .setValue (cellValue);
}
currentRow = currentRow + 1;
} 
  

javascript – Node.js: "TypeError: Can not read property" get "from undefined"

I have 3 errors, or more, I do not know, here they are (I'm going to put the code that makes the mistake):

TypeError: Unable to read property 'get & # 39; undefined

				let data = ops.active.get (message.guild.id) || {};

if (! data.connection) data.connection = wait message.member.voiceChannel.join ()
if (! data.queue) data.queue = [];
data.guildID = message.guild.id;

UnhandledPromiseRejectionWarning: Rejection of an unmanaged promise. This error is due either to the launch of an asynchronous function without a catch block, or to the rejection of a promise that has not been handled with .catch (). (ID of rejection: 1)

(node: 10648) [DEP0018] DeprecationWarning: unmanaged promises are obsolete. In the future, discards of unmanaged promises will terminate the Node.js process with a non-zero exit code.

(The last 2 do not have an exact code, here is my complete code:

const ytdl = require (& # 39; ytdl-core & # 39;);
const streamOptions = {search: 0, volume: 1};

exports.run = async (client, message, arguments, ops) => {

if (! message.member.voiceChannel) returns message.channel.send (& # 39; Please connect to a voice channel to read tutorials on how to earn more from PeterGriffinCoins! & # 39;);

// if (message.guild.me.voiceChannel) returns message.channel.send (Sorry, I am already logged in to this guild.);

if (! args[0]) return message.channel.send (Sorry, please enter the URL of the video so that I can steal it and put it on voice chat.);

let validate = wait ytdl.validateURL (args[0])

if (! validate) return message.channel.send (Sorry, please enter a valid ** URL ** after the order. & # 39;);

leave info = wait ytdl.getInfo (args[0])


let data = ops.active.get (message.guild.id) || {};

if (! data.connection) data.connection = wait message.member.voiceChannel.join ()
if (! data.queue) data.queue = [];
data.guildID = message.guild.id;

data.queue.push ({
songTitle: info.title,
requestor: message.author.tag,
url: args[0],
advertChannel: message.channel.id
});

if (! data.dispatcher) playstream (client, ops, data);
other {

message.channel.send (`Added to queue: $ {info.title} | Requested by: $ {message.author.id}`);

}

ops.active.set (message.guild.id, data);

}

asynchronous function playstream (client, ops, data) {

client.channels.get (data.queue[0].announceChannel) .send (`Currently playing: $ {data.queue[0].songTitle} | Required by: $ {data.queue[0].requester} `);

data.dispatcher = wait data.connection.playstream (ytdl (data.queue[0].url, {filter: uniquement only}));
data.dispatcher.guildID = data.guildID;

data.dispatcher.once (& # 39; finish & # 39; function () {

finish (client, ops, this);
});
}
finish function (client, ops, dispatcher) {

let fetched = ops.active.get (dispatcher.guildID);

fetched.queue.shift ();

if (fetched.queue.length> 0) {

ops.active.set (dispatcher.guildID, retrieved);

playstream (client, ops, recovered);
} other {

ops.active.delete (dispatcher.guildID);

let vc = client.get (dispatcher.guildID) .me.voiceChannel;
if (vc) vc.leave ();
}

}

html – Error "Attempt to get the property" fetch_row "from non-object in C: xampp htdocs connection connection3.php to line 28"

good night.
I study design and they let me plan a PHP database. The problem is that I get a "Notice: try to get the property" fetch_row "from non-object in C: xampp htdocs conexion conexion3.php online 28 "when I open it in the browser. This refers to the line "$ rows = $ result-> fetch_row;"
I do not know how to solve it because, depending on the format used, I changed only the information in the database.
The complete code is as follows:

connect_error) {
die ("Error in connection". $ myconexion-> connect_error);
}
if not {
echo "The connection has been established successfully …". $ myconexion-> host_info. "

";
}

?>

Connection example 2

NameOfficial number

query ("select name, nempleado from auto_veloz");

$ rows = $ result-> fetch_row;
if ($ rows> = 1) {

while ($ row = $ result-> fetch_assoc ()) {
?>


     
    
    

to close ();

?>

javascript – I continue to encounter an error "Unable to read property" innerHTML "of undefined"

I am a novice in game design and I have to create a game for my project but I still have a mistake to make with:

index.html: 93 Uncaught TypeError: Unable to read property 'innerHTML & # 39; of undefined

at drawMissiles (index.html: 93)

on gameLoop (index.html: 140)

An idea of ​​how to solve this problem?

                drawMissiles ()
}


drawMissiles function () {
document.getElementsByTagName (missile & # 39;)[0].innerHTML <--- (index.html: 93)
for (var i = 0; i <missiles.length; i ++) {
document.getElementById ("missile"). innerHTML + =
`
`;

javascript – Leaflet Draw "Unable to read property" enable "undefined" by adding control to geoJSON layer

I'm trying to use the flyer editing feature on the polygons I've loaded from my database. When I click on the flyer modification button, the error message appears.
Could not read property & # 39; enable & # 39; of indefinite

This thread describes a similar problem, and the user ddproxy said

"Since FeatureGroup extends LayerGroup You can browse layers
presented and add them individually to the FeatureGroup used to
Leaflet.draw "

I do not understand what it means to "cross", I thought to add a layer group, so I'm not sure what I would do. Does this have to do with the fact that I'm adding the polygons as a geoJSON object?
Adding polygons to the map, linking their pop-up windows and assigning them custom colors works perfectly.

The following is the relevant code:


And the function loadHazards ():

function loadHazards () {
$ .ajax ({
type: "GET",
url: & # 39; / loadPolygonFromDatabase & # 39;
success: function (polygons) {
polygons = JSON.parse (polygons);

var toAdd = [];
for (i in polygons) {

var item = {
"type": "Feature",
"Properties": {
"Category":"",
"the description":"",
"ID": ""
}
"geometry": {
"type": "polygon",
"contact information":[],

}

};

article["geometry"]["coordinates"][0]    = polygons[i]["coordinates"];
article["properties"]["category"]                    = polygons[i]["category"];
article["properties"]["description"]        = polygons[i]["description"];
article["properties"]["ID"]        = polygons[i]["ID"];
toAdd.push (item);

}

// Add information to a popup
var layerGroup = L.geoJSON (toAdd, {
onEachFeature: function (feature, layer) {
layer.bindPopup (& # 39;

& # 39; + feature.properties.category + & # 39;

& # 39; + & # 39;

& # 39; + feature.properties.description + & # 39;

& # 39;); layer.id = feature.properties.ID; } style: function (functionality) { switch (feature.properties.category) { case & # 39; Rabid_Beavers & # 39 ;: return {color: "# 663326"}; Fire box: return {color: "# ff0000"}; box "Flood": return {color: "# 0000ff"}; } } }). addTo (Risks); } }); }

Thanks in advance!