I have this database, which looks like this
so the first keys are user uid taken from auth, and then the username he/she provided and what did they score for each match are taken also..
I just wanted to get each user total points - for example Ray total points is 45 and Wood total points is 44 but after looking through for the docs all I was able to do was just for one user, I have to write each user name and the specific match for each line to get the value.. now think of how it will be if they are dozens of users? hmm a lot of lines..
here is the JSON
the javascript code
var query = firebase.database().ref();
query.once("value")
.then(function(snapshot) {
snapshot.forEach(function(childSnapshot) {
var key = childSnapshot.key;
var Data1 = childSnapshot.child("Ray/Match1/Points").val();
var Data2 = childSnapshot.child("Ray/Match2/Points").val();
console.log(Data1 + Data2);
});
})
which will let me display, Ray total points, but not for Wood obviously I have to repeat it and write it..
So how do i solve this?
I took a look at your problem and I think I have your solution, or at the very least a PATHWAY to your solution. Ok, first I'll explain the basic issue, then I'll attempt to provide you with some generic-ish code (I'll attempt to use some of the variables you used). And away we go!
Basically what I see is 2 steps...
STEP 1 - You need to use a "constructor function" that will create new user objects with their own name (and/or user ID) and their own set of properties.
With that line of thinking, you can have the constructor function include properties such as "user name", "match points 1", "match points 2" and then a function that console logs the summary of each name and their total points from match points 1 and 2.
STEP 2 - You need to put the constructor function inside of a loop that will go through the database looking for the specific properties you need to fill in the properties needed by the constructor function to spit out the info you're looking for.
So... and let's take a deep breath because that was a lot of words... let's try to code that. I'll use generic properties in a way that I think will make it easy for you to insert your own property/variable names.
var user = function(name, match1, match2){
this.name = name;
this.match1 = match1;
this.match2 = match2;
this.pointTotal = function(match1, match2) {
console.log(match1 + match2);};
this.summary = function(){
console.log(name + " has a total of " + pointTotal + "
points.");};
}
the "This" part of the code allows ANY user name to be used and not just specific ones.
Ok, so the code above takes care of the constructor function part of the issue. Now it doesn't matter how many users you need to create with unique names.
The next step is to create some kind of loop function that will go through the database and fill in the properties needed to create each user so that you can get the total points from EVERY user and not just one.
Again, I will use generic-ish property/variable names...
var key = childSnapshot.key;
while(i = 0; i < key.length + 1; i++) {
var user = function(name, match1, match2){
this.name = name;
this.match1 = match1;
this.match2 = match2;
this.pointTotal = function(match1, match2) {
console.log(match1 + match2);};
this.summary = function(){
console.log(name + " has a total of " + pointTotal + " points.");};
}
}
That is a whole lot of words and the code is a hybrid of generic property names/variables and of property names/variables used by you, but I'm certain that I am on the correct pathway.
I have a lot of confidence that if you used the code and EXPLANATION that I provided, that if you plug in your own variables you will get the solution that you need.
In closing I just want to say that I REALLY hope that helps and if it doesn't I'd like to help solve the problem one way or another because I need the practice. I work a job with weird hours and so if I don't answer right away I am likely at my job :(
Good luck and I hope I helped!
simply add total node to your db
|_Id
|_ $userId:
| |_ Ray
| | |_ Match1:24
| | |_ Match2:21
| |_ total:45
and then get user`s total
var query = firebase.database().ref();
query.once("value")
.then(function(snapshot) {
snapshot.forEach(function(childSnapshot) {
var total = childSnapshot.child("total").val();
console.log(total);
});
})
you can add the total node using cloud functions
Check out this implementation. No need for cloud function.
firebase().database().ref().on('value', function(snapshot) {
snapshot.forEach((user)=>{
user.forEach((matches)=> {
var total = 0;
matches.forEach((match)=> {
total += match.val().Points;
});
console.log(total);
});
});
})
If the key is the user's Id, why add yet another nested object with the user's name? Do you expect one user to have multiple usernames? That sounds weird and adds on complexity, as you have probably noticed. If you need to keep the user name somewhere in Firebase, it is recommended that you dedicate a user details section somewhere directly under the user Id key. Here is a JavaScript representation of the Firebase object structure:
{
a1230scfkls1240: {
userinfo: {
username: 'Joe'
},
matches: {
asflk12405: {
points: 123
},
isdf534853: {
points: 345
}
}
}
}
Now, getting to the total points seems a bit more straightforward, does it not? 😎
To help you without modifying your current database structure, all you need is to loop through all the userId+username+matches permutation in your database. Here is an example code to achieve just that, you do not need any special Firebase feature, just good old JavaScript for-of loop:
const query = firebase.database().ref();
query.once('value')
.then(snapshot => {
const points = {}
const users = snapshot.val()
for (const userId of Object.keys(users)) {
const userprofile = users[userId]
for (const username of Object.keys(userprofile)) {
const user = userprofile[username]
for (const matchId of Object.keys(user)) {
const match = user[matchId]
// Store the points per user, per profile, or per both, depending on your needs
points[username] = points[username] === undefined
? points[username] = match.points
: points[username] += match.points
}
}
}
})
Related
I'm working with an NBA API where one of the features is finding players by their last name.
The issue I have; is that multiple players can have the same last name, of course.
An example of the response from the API when sorting with last names:
"players": [
0: {
"firstName":"Anthony"
"lastName":"Davis"
"teamId":"17"
"yearsPro":"9"
"collegeName":"Kentucky"
"country":"USA"
"playerId":"126"
"dateOfBirth":"1993-03-11"
"affiliation":"Kentucky/USA"
"startNba":"2012"
"heightInMeters":"2.08"
"weightInKilograms":"114.8"
1: {
"firstName":"Deyonta"
"lastName":"Davis"
"teamId":"14"
"yearsPro":"3"
"collegeName":"Michigan State"
"country":"USA"
"playerId":"127"
"dateOfBirth":"1996-12-02"
"affiliation":"Michigan State/USA"
"startNba":"2016"
"heightInMeters":"2.11"
"weightInKilograms":"107.5"
}
I limited the results here, but it goes on and on, etc.
So, I am looking to do two things:
First, extract/filter the correct player using their first name and last name.
In said extraction, I still need the complete array information when it is matched.
So essentially, I want 'Deyonta Davis', but when found - I also need the rest of said player's information (years pro, college, country, etc.)
I already have a command set up to retrieve the first result of the nested data in this API via last name - where the command takes the last name you input and sends the first result. The precise problem is that the first result is likely not to be the guy you are looking for.
The goal is to include first & last name to avoid pulling the wrong player.
A snippet of how I currently call the information via last name:
// Calling API
const splitmsg = message.content.split(' ')
var lastnameurl = "https://api-nba-v1.p.rapidapi.com/players/lastName/" + splitmsg[1];
axios.get(lastnameurl, {
headers: {
"x-rapidapi-key": apikey,
"x-rapidapi-host": apihost
}
// Extracting Player Information (first result)
var playerfirstname = response.data.api.players[0].firstName;
var playerlastname = response.data.api.players[0].lastName;
var collegename = response.data.api.players[0].collegeName;
var countryname = response.data.api.players[0].country;
var playerDOB = response.data.api.players[0].dateOfBirth;
var yrspro = response.data.api.players[0].yearsPro;
var startednba = response.data.api.players[0].startNba;
Any help would be appreciated, thank you.
If I understand the question correctly the task is:
Retrieve first matching object from an array where properties firstName and lastName equal to desired values.
To achieve this you could use build in find function.
const player = array.find(el => {
return el.firstName === "Deyonta" && el.lastName === "Davis"
});
Keep in mind if there is no such object in array the player will be undefined.
This is my code. I am trying since a couple of days to create an Array of Objects, which I will then store in Local Storage. Here is the problem, I need to first Get the existing value from Local Storage.
I then need to add the new data object to the existing array. I then convert it into JSON so that I can store it back in the local storage.
onRegisterSubmit(){
const user = {
a: this.a,
b: this.b,
c: this.c,
id: Date.now()
}
var abc = [];
var get = JSON.parse(localStorage.getItem('user'));
abc = [get];
abc.push(user);
localStorage.setItem('user', JSON.stringify(abc));
console.log(JSON.stringify(abc));
console.log(get);
}
I want the JSON to be an array of objects like this,
[{"hour":1,"minute":21,"ampm":"PM","repeatDays":[],"message":"","todayOrTomorrow":"Tomorrow","isRepeatMode":false,"isEnabled":false,"id":"1493797882440"},{"hour":1,"minute":24,"ampm":"PM","repeatDays":[],"message":"","todayOrTomorrow":"Tomorrow","isRepeatMode":false,"isEnabled":false,"id":"1493797896257"},{"hour":6,"minute":14,"ampm":"PM","repeatDays":[],"message":"","todayOrTomorrow":"Tomorrow","isRepeatMode":false,"isEnabled":false,"id":"1493815470408"}]
This is my JSON.
[[[[[[[{"id":1493820594019},{"id":1493820606448}],{"id":1493820609111}],{"id":1493820610150}],{"id":1493820610553}],{"id":1493820610827}],{"id":1493820611015}],{"id":1493820612018}]
I've been trying for several days and any help will be greatly appreciated.
The issues with that code are:
You're wrapping the result you get in an array, but in theory, you want to already have an array.
You're storing user, not get or abc. (You removed that with an edit.)
To store the array, do what you're doing:
localStorage.setItem("users", JSON.stringify(users));
To get the array:
users = JSON.parse(localStorage.getItem("users") || "[]");
Note how that provides a default (empty array) if getItem returns null because we've never stored our users there.
To add a user to the array:
users.push({id: 1, foo: "bar"});
Example (live on jsFiddle [Stack Snippets don't allow local storage]):
(function() { // Scoping function to avoid creating globals
// Loading
var users = JSON.parse(localStorage.getItem("users") || "[]");
console.log("# of users: " + users.length);
users.forEach(function(user, index) {
console.log("[" + index + "]: " + user.id);
});
// Modifying
var user = {
id: Math.floor(Math.random() * 1000000)
};
users.push(user);
console.log("Added user #" + user.id);
// Saving
localStorage.setItem("users", JSON.stringify(users));
})();
That shows you the list of current users in the console, adding one each time you refresh the page.
Try something like this:-
link https://jsfiddle.net/sureshraina/nLexkyfw/1/
var mydatas = new Array();
mydatas[0] = "data";
mydatas[1] = "data1";
mydatas[2] = "data2";
localStorage["mydatas"] = JSON.stringify(mydatas);
var datas = JSON.parse(localStorage["mydatas"]);
See this post.
You can't store Objects, you have to store a String. So the workaround is to stringify your Object before you store it (for example, you could use change it to a JSON object, store it, and read it again when needed).
I have a huge list of items about almost all the crops and these data is to be plotted using maps and charts. I would like to count the number of each crop, say how many times was cabbage planted. I use Firebase database to store the data and I retrieve it using this function below:
database = firebase.database()
var ref = database.ref('Planting-Calendar-Entries');
ref.on('value', gotData, errData);
function gotData(data){
console.log(data.val())
var veggie = data.val();
var keys = Object.keys(veggie);
console.log(keys);
let counter = 0
for (var i = 0; i < keys.length; i++){
var k = keys[i];
var Veg_planted = veggie[k].Veg_planted;
var coordinates = veggie[k].coordinates;
if (Veg_planted == 'Cabbage'){
counter++;
}
// vegAll = Veg_planted.count()
console.log(Veg_planted, coordinates)
}
console.log(counter)
}
function errData(err){
console.log('Error!');
console.log(err)
}
This data I retrieve it from the database where it gets updated whenever someone submits their planting information. The code I used above will only apply if my list is small, but I have a list of about 170 items and it would be hard to write code to count each crop individually using something like let counter = 0, counter++. Is there a way I could navigate around this?
I'm assuming data.val() returns an array, not an object, and you're misusing Object.keys() on an array instead of just looping over the array itself. If that's true, then it sounds like you want to group by the Veg_planted key and count the groupings:
const counts = Object.values(veggie).reduce((counts, { Veg_planted }) => ({
...counts,
[Veg_planted]: (counts[Veg_planted] || 0) + 1
}), {});
Usage:
const veggie = [{ Veg_planted: 'Cabbage' }, { Veg_planted: 'Cabbage' }, { Veg_planted: 'Corn' }];
// result of counts:
// {Cabbage: 2, Corn: 1}
Actually: the code to count the items is probably going to be the same, no matter how many items there are. The thing that is going to be a problem as you scale though is the amount of data that you have to retrieve that you're not displaying to the user.
Firebase does not support aggregation queries, and your approach only works for short lists of items. For a more scalable solution, you should store the actual count itself in the database too.
So:
Have a blaCount property for each bla that exists.
Increment/decrement the counter each time your write/remove a bla to/from the database.
Now you can read only the counters, instead of having to read the individual items.
Firestore would be better option. You can query based on the field value.
var plantingRef = db.collection("PlantingCalendarEntries");
var query = plantingRef.where("Veg_planted", "==", "Cabbage");
if you still want to stuck with realtime database.
Save Counters to database.
Or use cloud dunctions to count.
I am making a Discord bot and I want to add JSON values like this
{
"Server ID": {
"01-Ticket": {
User: "Some ID",
Channel_ID: "Some ID"
}
}
}
I added one using fs but, when I add another, it deletes the first value ("01-Ticket")
This is my index.js:
channel.send(welcomeEmbed).then(async msg => {
await msg.react("🔒")
let tickets = require('./tickets.json')[msg.guild.id];
tickets[msg.guild.id]
console.log(tickets)
fs.writeFileSync('tickets.json', JSON.stringify(tickets, null, 5))
})
There are simply two things you need to do: create a new name for the ticket (if the previous one was "01-Ticket", then you need to name the new one "02-Ticket") and insert the ticket into the object using its new name.
A Solution
Here's a full example of how you could do such a thing:
let tickets = require('./tickets.json');
let newName = "01-Ticket";
if (msg.guild.id in tickets) {
let guildTickets = tickets[msg.guild.id];
let oldName = Object.keys(guildTickets).sort((a,b) => a.localeCompare(b)).pop();
let newNumber = Number(oldName.split("-")[0]) + 1;
let length = newNumber.toString().length;
newName = ("0" + newNumber).slice(-((length - 1) + Math.ceil(2 / length))) + "-Ticket";
}
else {
tickets[msg.guild.id] = {};
}
let ticket = {
User: msg.author.id,
Channel_ID: msg.channel.id
}
tickets[msg.guild.id][newName] = ticket;
fs.writeFileSync('tickets.json', JSON.stringify(tickets, null, 5))
Explanation
And below is the same code, but I've commented each new line to make it easier for you to understand the purpose of everything I am doing in this example:
let tickets = require('./tickets.json');
let newName = "01-Ticket";
//Check if the guild has any tickets
if (msg.guild.id in tickets) {
//The guild does already have tickets
//Get the tickets for this guild
let guildTickets = tickets[msg.guild.id];
//Take all of the ticket names ("01-Ticket", "02-Ticket", etc.) via Object.keys(),
//sort them in ascending numerical order via .sort(),
//and get the last one (the largest number, or the name of the latest ticket) via .pop()
let oldName = Object.keys(guildTickets).sort((a,b) => a.localeCompare(b)).pop();
//Take the old ticket's name ("01-Ticket"), get its number ("01"), and increment
//it by one (so now it would be "2")
let newNumber = Number(oldName.split("-")[0]) + 1;
//The length of the new number (for "2", the length would be 1)
let length = newNumber.toString().length;
//Now add a single "0" to the start of the name (name so far: "0")
//then add the new number (name so far: "02")
//Then, from the end of the name go back as far as necessary to get the proper name (name so far: "02")
//This works with all amounts of digits (ex: 2 -> "02"; 12 -> "12")
newName = ("0" + newNumber).slice(-((length - 1) + Math.ceil(2 / length))) + "-Ticket";
}
else {
//No tickets have been made in this guild yet
//So set the guild's ticket list to an empty object
tickets[msg.guild.id] = {};
}
//Create the new ticket to add to the guild's ticket list
let ticket = {
User: msg.author.id,
Channel_ID: msg.channel.id
}
//Add the ticket to the guild's ticket list
tickets[msg.guild.id][newName] = ticket;
//Update the tickets.json with your updated 'tickets' object
fs.writeFileSync('tickets.json', JSON.stringify(tickets, null, 5))
So first I am checking whether or not the guild's ID is already in tickets.json. If it isn't, we are adding it in as an empty object (and we add in the new ticket with the default name: "01-Ticket"). If the guild's ID is already in the file, then we need to create a new name for our new ticket. So first I get the object representing the guild's tickets. Then I get all of the keys in that object (which are the tickets' names: "01-Ticket", "02-Ticket", and so on). I sort those keys from least to greatest (since all of the ticket names begin with numbers, this is essentially sorting them numerically), and retrieve the last ticket name in the sorted list using .pop() (which is the ticket name starting with the largest number). I then take the number from that ticket name, and add one to it. Then I make sure to add a "0" at the beginning of the new ticket name if it is only one digit long; I am using a complex formula and .slice() to do so, but you could do this with a simple if statement. I then create the ticket itself, setting its user ID and channel ID properties. Finally, I add the ticket to the guild's ticket list by updating the tickets variable, and then update tickets.json with the new value of tickets.
The new name creation in this code is tested and works. The rest of the code is not tested, but works exactly the same as it does in some of my own bots' working code. If any part of this answer doesn't make sense or if you spot an error, feel free to comment it.
I just need to merge two files with the same list, but with different values on each file. Preferably in JavaScript
For example:
File 1
{"list1":{"a":1,"b":2}
{"list2":{"c":3,"d":4}
File 2
{"list1":{"a":5,"b":6}
{"list2":{"c":7,"d":8}
The desired result is
{"list1":{"a":6,"b":8}
{"list2":{"c":10,"d":12}
Sorry for the noob question, but the person who sent me the files should have done this themselves, but are currently unavailable. The files are too big to do by hand.
This is not very flexible code, but it would be far more work, to make something more dynamic. You would have to parse the objects recursevely and check if the property is an object and then jump deeper. Until ou find the values.
And please be aware that I'm not making any type checking whatsoever. If the data contains faulty data it is not cought properly. Also this code requires this exact structure. If your object contains other properties it might crash too.
// your data
const f1l1 = '{"list1":{"a":1,"b":2}}';
const f1l2 = '{"list2":{"c":3,"d":4}}';
const f2l1 = '{"list1":{"a":5,"b":6}}';
const f2l2 = '{"list2":{"c":7,"d":8}}';
var result1= JSON.parse(f1l1);
var result2= JSON.parse(f1l2);
//the names of the list as they appear in your real data *must* be the first object
const nameList1 = Object.keys(result1)[0];
const nameList2 = Object.keys(result2)[0];
//remove the list name
result1=result1[nameList1];
result2= result2[nameList2];
//get data from other file nd remove list name
const file2List1= JSON.parse(f2l1)[nameList1];
const file2List2= JSON.parse(f2l2)[nameList2];
// go through all items and sum them if the value is already in the list, else put it in for list1
for (var prop in file2List1) {
if (Object.prototype.hasOwnProperty.call(file2List1, prop)) {
if(Object.prototype.hasOwnProperty.call(result1, prop)){
result1[prop] = result1[prop] + file2List1[prop];
}else{
result1[prop] = file2List1[prop];
}
}
}
// and now for list2
for (var prop in file2List2) {
if (Object.prototype.hasOwnProperty.call(file2List2, prop)) {
if(Object.prototype.hasOwnProperty.call(result2, prop)){
result2[prop] = result2[prop] + file2List2[prop];
}else{
result2[prop] = file2List2[prop];
}
}
}
//put names of lists back in.
result1 = {[nameList1]:result1};
result2 = {[nameList2]:result2};
//check results:
console.log("input data:");
console.log(JSON.parse(f1l1));
console.log(JSON.parse(f1l2));
console.log(JSON.parse(f2l1));
console.log(JSON.parse(f2l2));
console.log("output data:");
console.log(result1);
console.log(result2);
You can try this out
newList = list1.concat(list2);