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There are a couple of similar queries here about the IndexOf function, but I'm reaching out because although the answers provided have been helpful, none of them have solved the issue.
I have a (very) large 2d array from a spreadsheet of names vs id codes. I read these values in apps script into an array (rIdr in the snippet below).
I then build 2x one-dimensional arrays so that I can use IndexOf to search for a name in the first array then use the returned index it to pull out the value from the second array.
var keys=[]; var vals=[];
//build key-val lookup arrays
for (var i = 0; i < rIdr.values.length; i++){
var k = rIdr.values[i][0].toString()
keys[i]=k
var v = rIdr.values[i][1].toString()
vals[i]=k
}
The name I'm looking for is obtained from a JSON which is populated elsewhere. I iterate over the names in this object, looking for them in my key and val arrays:
jsonobj.data.forEach(function(value) {
var idx = keys.indexOf(value.first_names_txt + " " + value.last_name_txt)
var id = -1;
if (idx > -1){id = vals[idx]}
Logger.log(value.first_names_txt + " " + value.last_name_txt + " " + id)
});
I've verified that both the name i'm pulling out of the JSON object as well as the elements of the keys array are String types. I've seen in the object inspector that the keys array is an array of strings (not, for example, an array of array objects).
Try as I might, i can't get IndexOf to return anything other than -1.
Even if I explicitly look for a name which I know is in there (and actually is a copy paste of the name as it's written on the sheet that I'm pulling values from), I still get -1 returned
var test
test = keys.indexOf("Joe Bloggs")
I'm tearing my hair out here. I don't want to write a separate function to match a name in the keys array, because I'll either need to pass in the full keys array as an argument, or make it a global variable - neither of which i want to do for various reasons.
Can anyone help with why IndexOf doesn't work here?
And if this is an issue that won't go away, is there a way to write my own search function which avoids passing large arrays around or declaring them as global variables?
Thanks all in advance

Description
I've constructed a spreadsheet sheet using the names from the json data file, randomized the names so they are no longer in alphabetical order and then assigned an id number to each.
The sample script I've provided lists the id number for the names in the json data file. Notice I'm working with the original data array. I don't need to create key value arrays to get the result I want. And I'm not checking if a name doesn't exist in the data array.
I've truncatd the json data for brevity
Code.gs
function test_json() {
try {
let jdata = {
"type" : "entrants",
"data" : [ {
"type" : "entrant",
"id" : "en_tdgwjajthr",
"first_names_txt" : "Archie",
"last_name_txt" : "White",
"entrytype" : "et_dv8u152j",
"answers" : {
"q_wg5qq6bgvsy90rh" : "Partenza Nude-Espresso RT"
}
}, {
.
.
.
.
}, {
"type" : "entrant",
"id" : "en_8uhauoe3jo",
"first_names_txt" : "Valentijn",
"last_name_txt" : "Brax",
"entrytype" : "et_dv8u152j",
"answers" : {
"q_wg5qq6bgvsy90rh" : "Dulwich Paragon CC"
}
} ],
"has_more_bool" : false
};
let values = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("Test").getDataRange().getValues();
jdata.data.forEach(function(value){
let key = value.first_names_txt+" "+value.last_name_txt;
let found = values.find( row => row[0] === key );
console.log("key = "+key+" id = "+found[1]);
});
}
catch(err) {
console.log(err)
}
}
Execution log (abbreviated)
10:29:05 AM Notice Execution started
10:29:06 AM Info key = Archie White id = 21
10:29:06 AM Info key = ari panzer id = 15
10:29:06 AM Info key = Daniel Mulcahy id = 5
10:29:06 AM Info key = David Streule id = 12
10:29:06 AM Info key = Dominic Bell id = 10
10:29:06 AM Info key = Euan Davies id = 14

Extract specific nested array in JSON Objects that match data with Javascript

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.

Retrieve data from PHP file using $.getJSON

I'm trying to set up a comments system on photos.
I understand how to use $.getJSON when the array is like this:
get.php:
$var = 5;
echo json_encode(array('var'=>$var));
main.php:
$.getJSON("get.php",function(data){
number = data.var; // number = 5
});
But I have a more complex thing.
My comments table has these 4 columns: id | photo_id | comment | date
For example let's say we're trying to retrieve the comment data from the photo with
photo_id == 1.
We don't know how many comments there might be.
In getcomments.php:
$photoid = 1;
$comment = mysqli_query($conn,"SELECT * FROM comments WHERE photo_id='$photoid'");
while($commentrow = $comment->fetch_assoc()) {
$comments[] = $commentrow;
}
Then you encode it:
echo json_encode($comments);
Which prints something like this (the photo has 2 comments):
[{"id":"1","photo_id":"1","comment":"text","date":"23858556"},{"id":"2","photo_id":"1","comment":"text","date":"23858561"}]
How do I declare variables for the comments array?
$.getJSON("getcomments.php",function(data){
// how do I declare variables for the comments array, especially since you don't know how many there might be?
});
Additionally, I have two json arrays that need to be echoed within the same PHP file. i.e. echo json_encode(array('img1'=>$img1link)) and echo json_encode($comments); need to be echoed within the same PHP file, but it made the code stop working altogether.

If you want to display the comments you need to loop over the array. You can use for loop or forEach function.
$.getJSON("getcomments.php",function(data){
data.forEach(function(comment) {
$('div').append('<span>' + comment.comment + '</span>');
});
});
To display two JSONs you need to combine them into one JSON object.
echo json_encode(array('img' => $img1link, 'comments' => $comments));

[{"id":"1","photo_id":"1","comment":"text","date":"23858556"},{"id":"2","photo_id":"1","comment":"text","date":"23858561"}]
Using this JSON, data is an array and you should manage it as an array. You can loop through it using simple loops (for, while...) or using new functional methods like forEach, map, filter....
Please try with this example:
$.getJSON("getcomments.php",function(data){
data.forEach(function(item, index, all) {
console.log(item.comment);
});
});

Declare an object, and push it to the array.
var commentsArr = [];
for (var i = 0; i < data.length; i++) {
var objToPush = {
id: data.id,
comment: data.comment,
date: data.date
}
commentsArr.push(objToPush);
}

Loop through all Mongo collections and execute query

First of, I'm quite new to mongodb. Here's my question I've not been able to find a solution to.
Let's say I have 3 different collections.
mongos> show collections
collectionA
collectionB
collectionC
I want to create a script that iterates over all collections ind this database and find the last inserted timestamp in each of these collections. Here's what works inside mongos.
var last_element = db.collectionA.find().sort({_id:-1}).limit(1);
printjson(last_element.next()._id.getTimestamp());
ISODate("2014-08-28T06:45:47Z")
1. Problem (Iterate over all collections)
Is there any possibility to to sth. like.
var my_collections = show collections;
my_collections.forEach(function(current_collection){
print(current_collection);
});
Problem here, the assignment for my_collections does not work.
I get SyntaxError: Unexpected identifier. Do I need to quote the 'show' statement ? Is it even possible ?
2. Problem (storing collection in js var)
I can workaround Problem 1 by doing this:
var my_collections = ["collectionA", "collectionB", "collectionC"];
my_collections.forEach(function(current_collection){
var last_element = db.current_collection.find().sort({_id:-1}).limit(1);
print(current_collection);
printjson(last_element.next()._id.getTimestamp());
});
The last_element.next() produces the following error:
error hasNext: false at src/mongo/shell/query.js:124
It seems that last_element isn't saved correctly.
Any suggestions on what I'm doing wrong??
UPDATE
Neils answer lead me to this solution. In addition to his code I had to check if the function getTimestamp really exist. For some 'virtual' collections there seem to be no _id property.
db.getCollectionNames().forEach(function(collname) {
var last_element = db[collname].find().sort({_id:-1}).limit(1);
if(last_element.hasNext()){
var next = last_element.next();
if(next._id !== undefined && typeof next._id.getTimestamp == 'function'){
printjson(collname + " >> "+next._id.getTimestamp());
}else{
print(collname + " undefined!! (getTimestamp N/A)")
}
}
});

There is the db.getCollectionNames() helper method that does this for you. You can then implement your code:
db.getCollectionNames().forEach(function(collname) {
// find the last item in a collection
var last_element = db[collname].find().sort({_id:-1}).limit(1);
// check that it's not empty
if (last_element.hasNext()) {
// print its timestamp
printjson(last_element.next()._id.getTimestamp());
}
})
You probably also want a .hasNext() check in there to cater for possible empty collections.

Rename the collection name present in all the records using the following script:
db = db.getSiblingDB("admin");
dbs = db.runCommand({ "listDatabases": 1 }).databases;
dbs.forEach(function(database) {
db = db.getSiblingDB(database.name);
db.currentname.renameCollection("newname");
});

Looping to Parse JSON Data

Description and Goal:
Essentially data is constantly generated every 2 minutes into JSON data. What I need to do is retrieve the information from the supplied JSON data. The data will changed constantly. Once the information is parsed it needs to be captured into variables that can be used in other functions.
What I am stuck in is trying to figure out how to create a function with a loop that reassigns all of the data to stored variables that can later be used in functions.
Example information:
var json = {"data":
{"shop":[
{
"carID":"7",
"Garage":"7",
"Mechanic":"Michael Jamison",
"notificationsType":"repair",
"notificationsDesc":"Blown Head gasket and two rail mounts",
"notificationsDate":07/22/2011,
"notificationsTime":"00:02:18"
},
{
"CarID":"8",
"Garage":"7",
"Mechanic":"Tom Bennett",
"notificationsType":"event",
"notifications":"blown engine, 2 tires, and safety inspection",
"notificationsDate":"16 April 2008",
"notificationsTime":"08:26:24"
}
]
}};
function GetInformationToReassign(){
var i;
for(i=0; i<json.data.shop.length; i++)
{
//Then the data is looped, stored into multi-dimensional arrays that can be indexed.
}
}
So the ending result needs to be like this:
shop[0]={7,7,"Michael Jamison",repair,"Blown Head gasket and two rail mounts", 07/22/2011,00:02:18 }
shop[1]={}

You can loop through your JSON string using the following code,
var JSONstring=[{"key1":"value1","key2":"value2"},{"key3":"value3"}];
for(var i=0;i<JSONstring.length;i++){
var obj = JSONstring[i];
for(var key in obj){
var attrName = key;
var attrValue = obj[key];
//based on the result create as you need
}
}
Hope this helps...

It sounds to me like you want to extract the data in the "shop" property of the JSON object so that you can easily reference all of the shop's items. Here is an example:
var json =
{
"data":
{"shop":
[
{"itemName":"car", "price":30000},
{"itemName":"wheel", "price":500}
]
}
},
inventory = [];
// Map the shop's inventory to our inventory array.
for (var i = 0, j = json.data.shop.length; i < j; i += 1) {
inventory[i] = json.data.shop[i];
}
// Example of using our inventory array
console.log( inventory[0].itemName + " has a price of $" + inventory[0].price);

Well, your output example is not possible. You have what is a list of things, but you're using object syntax.
What would instead make sense if you really want those items in a list format instead of key-value pairs would be this:
shop[0]=[7,7,"Michael Jamison",repair,"Blown Head gasket and two rail mounts", 07/22/2011,00:02:18]
For looping through properties in an object you can use something like this:
var properties = Array();
for (var propertyName in theObject) {
// Check if it’s NOT a function
if (!(theObject[propertyName] instanceof Function)) {
properties.push(propertyName);
}
}
Honestly though, I'm not really sure why you'd want to put it in a different format. The json data already is about as good as it gets, you can do shop[0]["carID"] to get the data in that field.