Can I use an expression as an array index in javascript? - javascript

Ok folks, I am trying to copy a section of a large array into an array of objects. The large array is a row from a google sheet which represents RMA data. The small array contains several (circuit) board objects. I am reading 4 items from the large array into each 'board'. To read the correct item from the large array, I need to increment the operator before reading into a new named property in my object within my small array. If I was using an array for 'board' it would be easy: create a sub loop and increment the index at each iteration. But because I'm using an object, I don't know how to do it. I tried to use an expression in my index (see code). Also, btw all this is happening inside a larger object designed to read in multiple rows from a google sheet and process them. Here's the code:
board:
[
{
code: "Board Code",
software: "S-Ver",
problem: "Problem",
riu: "RiU",
msqNotes: "MSq Notes"
}
],
grab: function (rowArray, board)
{
rma.timestamp = rowArray[1];
rma.guidelinesAgree = rowArray[2];
rma.expediteyn = rowArray[3];
rma.contact.name = rowArray[4];
rma.contact.coName = rowArray[5];
rma.contact.emailAddr = rowArray[6];
rma.contact.telNum = rowArray[7];
rma.contact.shipAddr = rowArray[8];
var boardArray = rma.createBoardArray();
var boardStartIndex = 9;
for(i = 0; i< 5; i++)
{
var k = i + 1;
board.push()
board[k].code = rowArray[boardStartIndex + 4i]; //prob here
board[k].software = rowArray[boardStartIndex + 4i + 1];
board[k].problem = rowArray[boardStartIndex + 4i + 2];
board[k].riu = rowArray[boardStartIndex + 4i + 3];
board[k].msqNotes = "";
}
Note: In Google script editor, when I try to debug, I get the error: "Missing ] in index expression." at the line that I've labeled "//prob here" above.
Another Note: I am using an expression 'k' for the index, because I have purposely initialized the 'board' array with a board[0] that contains title values.... I want to create a google doc afterword with a table that has the first row full of titles/labels for each column, and I am using the first object to store those titles. Previously I was using "board[i+1].code =" etc.
IS THERE A WAY TO USE AN EXPRESSION FOR AN ARRAY INDEX THAT IS KOSHER IN JS?

This is a syntax error:
rowArray[boardStartIndex + 4i]
I'm guessing you meant this:
rowArray[boardStartIndex + 4 * i]
I know in math & science "4i" means "4 times i" but in Javascript you have to use the "*" operator.

Related

How do I insert an array into a Google Doc using data from Google Sheets?

I am trying to pull a range of names from a Google sheet and place it into a Google Doc.In the spreadsheet, the last names("lastNames") come before the first names ("firstNames"), and both are in separate columns. I am trying to place the first and last names together into my doc with the first names first.
I used a for loop to put the first and last names together into an array ("fullNames"), and that part works just fine. When I used Logger.log, all the first names and last names are together in an array, with each full name separated by a common, just the way I wanted them to be.
What I can't figure out how to do is actually insert this new array into the body of the document. I am using the appendTable method, but every time I try to I get the following error: "The parameters (number[]) don't match the method signature for DocumentApp.Body.appendTable."
What changes do I have to make to my code to actually place my new array into my google doc?
function namePusher() {
var ss = SpreadsheetApp.openById("1CHvnejDrrb9W5txeXVMXxBoVjLpvWSi40ehZkGZYjaY");
var lastNames = ss.getSheetByName("Campbell").getRange(2, 2, 18).getValues();
var firstNames = ss.getSheetByName("Campbell").getRange(2, 3, 18).getValues();
//Logger.log(firstNames);
var fullNames = [];
for(var i = 0; i < firstNames.length; i++){
var nameConcat = firstNames[i] + " " + lastNames[i]
fullNames.push(nameConcat);
}
//Logger.log(fullNames);
var doc = DocumentApp.getActiveDocument().getBody();
doc.appendTable(fullNames);
}
Modification points:
I think that there 2 reasons in your issue.
Values retrieved by getValues() is 2 dimensional array.
data of appendTable(data) is required to be 2 dimensional array.
In your script, fullNames is 1 dimensional array. By this, such error occurs.
In your script, the values are retrieved 2 columns using 2 getValues(). In this case, the cost will become a bit high. You can retrieve the values using one getValues().
When these points are reflected to your script, it becomes as follows.
Modified script:
function namePusher() {
var ss = SpreadsheetApp.openById("1CHvnejDrrb9W5txeXVMXxBoVjLpvWSi40ehZkGZYjaY");
var values = ss.getSheetByName("Campbell").getRange("B2:C19").getValues(); // Modified
var fullNames = [];
for(var i = 0; i < values.length; i++){ // Modified
var nameConcat = [values[i][1] + " " + values[i][0]]; // Modified
fullNames.push(nameConcat);
}
var doc = DocumentApp.getActiveDocument().getBody();
doc.appendTable(fullNames);
}
References:
getValues()
appendTable(cells)
One simple way to fix your code is by replacing
fullNames.push(nameConcat);
by
fullNames.push([nameConcat]);
The problem with your script is that fullNames is an Array of strings but your should pass an Array of Arrays of strings (or objects that might be coerced to strings).
Basic demo
var data = [
['A','B','C'],
[1, 'Apple','Red'],
[2, 'Banana','Yellow']
];
function myFunction() {
const doc = DocumentApp.getActiveDocument();
const body = doc.getBody();
body.appendTable(data);
}
As mentioned on Tanaike's answer there are other "improvement opportunities"
Reduce the number of calls to the Google Apps Script Classes and Methods
Use better ways to manage Arrays and to concatenate strings.

Apps Script doesn't compare 2 values in if-statement

I've created a new project that should compare a name from Sheet1 with a list of names in Sheet2 and check if the name is already in that list. For that I chose a for-loop to get through the list in Sheet2 and compare every list entry with the name from Sheet1. Only if the name already exists in the list stuff should happen.
function myFunction() {
var tabSheet1 = 'Sheet1';
var tabSheet2 = 'Sheet2';
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet1 = ss.getSheetByName(tabSheet1);
var sheet2 = ss.getSheetByName(tabSheet2);
var lastRow1 = sheet2.getLastRow() + 1;
var playerNameSheet1 = sheet1.getRange(1, 1).getValue();
for (var j = 1; j < lastRow1; j++) {
var playerNameSheet2 = sheet2.getRange(j, 1).getValue();
if (playerNameSheet2 == playerNameSheet1) {
...stuff...
}
}
}
Now my problem is that it seems like the script isn't able to identify that a name already exists in the list. Both values (playerNameSheet1 and playerNameSheet2) are completely identical (no space or other hidden obstacles), however the script would never continue with stuff in the if-statement. My example name to test my script was "Oliver Baumann".
I'm a bit confused about it - even more, because another comparison a bit later in the script code works just fine.
I've already tried to change the operator into === but that wouldn't work either.
if (playerNameSheet2 === playerNameSheet1) {
...stuff...
}
I've also observed that if I put a dot behind both variables I'm only able to choose further functions with playerNameSheet2, but not with playerNameSheet1. Maybe I did a typing error and am just too blind to see it? I don't know. Anyone an idea how to resolve the issue?
The complete project can be found here. However, a lot of stuff is in german and very rudimental. I just started it and haven't got time to clean it up. Just so you don't wonder.
You will likely benefit from a change to your inspection routine - currently what you have is not scalable due to the slow, repeated calls to the Spreadsheet Service. Use a batch method - getValues() - to return a Javascript Array that contains all the content you could want from your 'master list' of names:
// Create an N x 1 array of arrays, e.g. [ [r1c1], [r2c1], [r3c1], ... [rNc1] ],
// of data in column A in sheet2. There will be blanks at the end if other columns have more data.
var allNames = sheet2.getRange(1, 1, sheet2.getLastRow(), 1).getValues();
To check if the name from the first sheet is present, we can replace this code:
for (var j = 1; j < lastRow1; j++) {
var playerNameSheet2 = sheet2.getRange(j, 1).getValue();
if (playerNameSheet2 == playerNameSheet1) {
/* do stuff */
with this code (note j now starts at 0):
for (var j = 0; j < allNames.length; ++j) {
if (playerNameSheet1 === allNames[j][0]) {
/* do stuff */
If you only need to do stuff on a name once in the function call (e.g. you don't need to execute the loop body twenty times when the sheet 1 name is "Bob" and there are twenty instances of "Bob" on sheet 2), you can simplify checking allNames for a value with the Array#indexOf method. First, one must collapse the "2D" array of arrays of values into an array of values. We want to apply a function to every element of the outer array and construct an array of its outputs, so we choose to call Array#map on it:
var db = allNames.map(function (row) { return row[0]; });
The function we use simply returns the first element of the passed element - i.e. the value in the first column, resulting in an output like [ r1c1, r2c1, r3c1, ... rNc1 ].
The replacement code is then:
if (db.indexOf(playerNameSheet1) === -1) {
console.log({
message: "Did not find '" + playerNameSheet1 + "' in database.",
database: db, original: allNames, searched: playerNameSheet1
});
return;
}
/* do stuff */
Which says "if the name is not on sheet 2, log the failed lookup and then quit running the function." To promote actual logging, the log is sent to Stackdriver, which will keep it for much longer than the native Logger class would.
If your do stuff bits use the j index, you can still obtain that index and use the associated row in sheet 2:
var index = db.indexOf(playerNameSheet1);
if (index === -1) {
console.log({
message: "Did not find '" + playerNameSheet1 + "' in database.",
database: db, original: allNames, searched: playerNameSheet1
});
return;
}
/* do stuff with the user's existing row of data, e.g.
var userDataRow = sheet2.getRange(index + 1, 1, 1, sheet2.getLastColumn()).getValues();
var userData = userDataRow[0];
...
*/
A possible improvement to the indexOf modification, which I leave for you to investigate and/or implement, would be to use an Object to hold the names as "keys" (object properties) and the index of the associated sheet data (or even the data directly) as the associated value of the key-value pair.
you can try to convert data in array and compare in for-loop:
var dataRangeSpieler = sheetSpieler.getDataRange().getValues();
var dataRangeDBSpiele = sheetDBSpieler.getDataRange().getValues();
for (i in dataRangeSpieler ) {
for (j in dataRangeDBSpiele) {
if (dataRangeSpieler[i][1] == dataRangeDBSpiele[j][0]) {
Logger.log(dataRangeSpieler[i][1]); //Oliver Baumann
}
}
}

Javascript Multidimensional Array is Empty

I think Im misunderstanding something here - I normally work in PHP and think I'm missing something small. My final array tmp is empty and displays as ",,,,,,,,,,,,,,,,". It seems to me my tmp array might be emptied somewhere or the scope gets reset for some reason. I'm using this as coordinates from a table where you can select table rows and posting to a webservice but my array seem to be erroneous.
var length = $("#arrayCount").html();
var letters = ["A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"];
var col = getSelectedColumn(); //for example sake lets say "B" is the selected column
var row = getSelectedRow(); //selected rows will be from "11" - "16"
var columnIndexStart = letters.indexOf(col[0]);
var tmp = [];
for(var i = row[0]; i <= row[1]; i++) //rows[0] = 11 and rows[1] = 16
{
tmp[i] = [];
for(var j = columnIndexStart; j < letters.length; j++) //columns and starts at index 1 if we work with "B"
{
var val = $("#" + i + "_" + letters[j]).html(); //using the row and letters as the associated DOM elements ID. Easier to retrieve it's HTML then.
if(val != undefined)
{
console.log("Index [" + i + "]['" + letters[j] + "'] = " + val); //works perfectly and prints as it should.
tmp[i]['"'+letters[j]+'"'] = val; //using quotes to save letters? Is this preferred?
}
}
}
console.log('Final Array: ' + tmp); //empty??
console.log('Final Array: ' + tmp[14]['G']); //testing HTML output. But is undefined.
return tmp;
Any help will be greatly appreciated.
Edited:
Example of console output.
My final array tmp is empty and displays as ",,,,,,,,,,,,,,,,"
With non-numeric index you are setting the field of object and not the element for index.
If you will have two-dimensional numeric array with numeric indices like the following:
var tmp = [[1,2,3], [1,2,3]];
after console.log('tmp = ' + tmp); you will obviously get the output string like:
tmp = 1,2,3,1,2,3
Because when you are trying to convert array to string it converts it elements to string and represent them with a commas.
However when you are trying to set element with non-numeric index, you are setting the field of this object.
var tmp = [];
tmp['A'] = 123;
console.log("tmp = " + tmp); // tmp =
console.log(tmp.A); //123
So, console.log in your case works good - it is serializing all elements of two-dimensional array. But no one array of the second level does not have stored values, it has only fields, which are not included in the string representation of array.
You are getting a set of commas, because each sub-array of tmp array does not contains any element, so it's string representation is an empty string. Each sub-array contains the required data into it's fields.
When you are performing sum operation of string and object you are forcing object to convert to string representation. Instead of this it is recommended to use console.log(yourObj) - it will log the whole object without converting it to string.
//using quotes to save letters? Is this preferred?
No, "A" and A are different identifiers.
var s = new Object();
s['"A"'] = 123;
console.log(s['A']); //undefined
console.log(s['"A"']); //123
Additionally, if you will set fields with quotes - you can not get the field in normal style:
console.log(s."A"); //syntax error : expected identifier after '.'
You can also just do this (use comma, not plus):
console.log('Final Array: ', tmp); //empty??
console.log('Final Array: ', tmp[14]['G']);

Merging Multiple Arrays Evenly/Alternating with Javascript and Google AppScript

I'm trying to merge multiple arrays evenly/alternating in javascript/Google appScript. There are several arrays (5 or 6). I've tried 2 different methods, but neither worked. I don't work a lot with javascript honestly and I've managed to get the code to this point, but I can't get it merge properly; and most of them said merging two arrays to one (might be my problem).
I've seen plenty on php examples that were on how to do this and they are pretty straight forward in logic reading and I understand them better, but all javascript methods I've looked at and tried so far have failed to produce the results I want. I'm not sure if it's the way AppScript is formatting the arrays or they're just no made to handle more that 2.
My data looks similar to this at the moment:
var title = ["sometitle1","sometitle2","sometitle3"];
var link = ["somelink1","somelink2","somelink3"];
var date = ["somedate1","somedate2","somedate3"];
var data = ["somedata1","somedata2","somedata3"];
var all = [title,link,date,data];
var mix = [];
Note: all the variable data will/should be the same length since the data is being pulled from a spreadsheet.
My desired output is:
mix = ["sometitle1","somelink1","somedate1","somedata1","sometitle2","somelink2","somedate2","somedata2","sometitle3","somelink3","somedate3","somedata3"];
I tried using appscript to merge them with this: return ContentService.createTextOutput(title + link + data + date), but it didn't work out properly, it printed them in that order instead of merging the way I'd like them too.
Then I tried using a loop merge that I found here on sstackoverflow:
for (var i = 0; all.length !== 0; i++) {
var j = 0;
while (j < all.length) {
if (i >= all[j].length) {
all.splice(j, 1);
} else {
mix.push(all[j][i]);
j += 1;
}
}
}
But it splice merges every letter with a comma
mix = [s,o,m,e,t,i,t,l,e,1,s,o,m,e,t,i,t,l,e,2,s,o,m,e,t,i,t,l,e,3,s,o,m,e,l,i,n,k,1,...]
and doesn't alternate data either.
The code (2 version) I'm working on is: here with Output
&
Here with Output
(Also, dumb question, but do I use title[i] + \n OR title[i] + "\n" for adding new lines?)
Use a for loop and the push() method like this :
function test(){
var title = ["sometitle1","sometitle2","sometitle3"];
var link = ["somelink1","somelink2","somelink3"];
var date = ["somedate1","somedate2","somedate3"];
var data = ["somedata1","somedata2","somedata3"];
//var all = [title,link,date,data];
var mix = [];
for(var n=0;n<title.length;n++){
mix.push(title[n],link[n],date[n],data[n]);
}
Logger.log(JSON.stringify(mix));
}
And also : title[i] + "\n" for adding new lines
Edit following comments :
Your code should end like this :
...
for(var n=0;n<titles.length;n++){
mix.push(titles[n],links[n],descriptions[n],pubdates[n],authors[n]);
}
var mixString = mix.join('');// convert the array to a string without separator or choose the separator you want by changing the argument.
//Print data and set mimetype
return ContentService.createTextOutput(mixString)
.setMimeType(ContentService.MimeType.RSS);
}

Pushing object to array results in same value

I have the following javascript code that does not work as I would expect it to. I have a list of checkboxes of which two of the items are "TestDuration" and "AssessmentScores". I'm trying to iterate through the list (which works fine) and have it add the values that are checked to the array.
var SAIndex = 0;
var SSIndex = 0;
var ScoresIndex = 0;
var SubAssessments = [];
var SubAssessmentScores = [];
//Get to the container element
var SSList = document.getElementById("islSubAssessmentScore_container");
//turn it into an array of the checkbox inputs
SSList = SSList.getElementsByTagName("input");
//create a temporary object to store my values
var tempPair = new Object();
//iterate through the checkbox lists
for(var i = 1; i < SSList.length;i++)
{
//if the value is checked add it to the array
if (SSList[i].checked)
{
var P = SubAssessments[SAIndex];
var V = SSList[i].value;
//tempPair.Parent = SubAssessments[SAIndex];
tempPair.Parent = P;
//tempPair.Value = SSList[i].value;
tempPair.Value = V;
//show me the values as they exist on the page
alert(tempPair.Parent + "|" + tempPair.Value);
SubAssessmentScores.push(tempPair);
//show me the values I just added to the array
alert(SubAssessmentScores.length-1 + "|" + SubAssessmentScores[SubAssessmentScores.length-1].Parent + "|" + SubAssessmentScores[SubAssessmentScores.length-1].Value);
//uncheck the values so when I refresh that section of the page the list is empty
SSList[i].checked = false;
}
}
//output the list of objects I just created
for (i = 0;i < SubAssessmentScores.length;i++)
alert(i + "|" + SubAssessmentScores[i].Parent + "|" + SubAssessmentScores[i].Value)
Now what happens is that when I iterate through the list I get the following alerts:
-first pass-
StudentID|TestDuration
0|StudentID|TestDuration
-second pass-
StudentID|AssessmentScores
1|StudentID|AssessmentScores
This is what I expect to output... However at the end of the code snippet when it runs the for loops to spit out all the values I get the following alerts...
0|StudentID|AssessmentScores
1|StudentID|AssessmentScores
I can't for the life of me figure out why it's replacing the first value with the second value. I thought it might be using a reference variable which is why I added in the P and V variables to try to get around that if that was the case, but the results are the same.
This is because you are adding the same variable every iteration of the loop.
Try changing your push like this:
SubAssessmentScores.push({
Parent: P,
Value: V
});
That said, I recommend you study a little more javascript and conventions in the language, for example your variable naming is frowned upon because you should only use capital letters on the beginning of a name for constructor functions.
A good book is Javascript the good parts by Douglas Crockford.

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