Using JavaScript operations within your script is considerably faster than calling other services. Anything you can accomplish within Google Apps Script itself will be much faster than making calls that need to fetch data from Google's servers or an external server, such as requests to Spreadsheets, Docs, Sites, Translate, UrlFetch, and so on. Your scripts will run faster if you can find ways to minimize the calls the scripts make to those services. If you are working on a script project with other developers, you can collaborate on Apps Script projects with shared drives.

Files in a shared drive are owned by the group, rather than individuals. This makes development and maintenance of the project easier. Scripts commonly need to read in data from a spreadsheet, perform calculations, and then write out the results of the data to a spreadsheet.

Google Apps Script already has some built-in optimization, such as using look-ahead caching to retrieve what a script is likely to get and write caching to save what is likely to be set.

You can write scripts to take maximum advantage of the built-in caching, by minimizing the number of reads and writes. Alternating read and write commands is slow. To speed up a script, read all data into an array with one command, perform any operations on the data in the array, and write the data out with one command. Here's an example — an example you should not follow or use.

A script uses the following code to set the background colors of every cell in a x spreadsheet grid. It uses as function named getColorFromCoordinates not shown here to determine what color to use for each cell:. The script is inefficient: it loops through rows and columns, writing consecutively to 10, cells. The Google Apps Script write-back cache helps, because it forces a write-back using flush at the end of every line. Because of the caching, there are only calls to the Spreadsheet.

But the code can be made much more efficient by batching the calls. Here's a rewrite in which the cell range is read into an array called colors, the color assignment operation is performed on the data in the array, and the values in the array are written out to the spreadsheet:. Libraries are a convenient way to reuse code, but they slightly increase the time it takes to start the script.

This delay isn't noticeable for relatively long-running scripts like a utility script to clean up your Google Drive filesbut for client-side HTML Service user interfaces that make repeated, short-running google. Because of this issue, libraries should be used sparingly in add-onsand you may want to avoid them in non-add-on scripts that make lots of google.

You can use the Cache Service to cache resources between script executions. By caching data, you can reduce the number of times or frequency with which you have to fetch the data. Consider the scenario where you have an RSS feed at example. The example below shows how to use the Cache Service to speed up access to this data. Now, while you'll have to still wait 20 seconds if the item is not in cache, subsequent accesses will be very fast until the item expires out of the cache in 25 minutes.

Except as otherwise noted, the content of this page is licensed under the Creative Commons Attribution 4. For details, see the Google Developers Site Policies.

Other Resources. This document lists best practices that will help you improve the performance of your scripts. Minimize calls to other services Using JavaScript operations within your script is considerably faster than calling other services. Consider collaborating with shared drives If you are working on a script project with other developers, you can collaborate on Apps Script projects with shared drives. Use batch operations Scripts commonly need to read in data from a spreadsheet, perform calculations, and then write out the results of the data to a spreadsheet.

The efficient code runs in just 1 second! Avoid libraries in UI-heavy scripts Libraries are a convenient way to reuse code, but they slightly increase the time it takes to start the script. Use the Cache service You can use the Cache Service to cache resources between script executions.In the previous post in the Google Apps Script Pattern series we looked at selectively updating rows of data in a Google Sheet. For this post we will look at a couple of patterns for inserting multiple rows of data into Google Sheets.

This is useful for a single row of data as it combines inserting a row and adding the data. If you have multiple rows then for performance you should use. To use. A common pattern is to loop over the returned data and push values into an array and then write them to a sheet. An example using calendar events is shown below:. To write the data we need to specify a range to. In the above example it is using. In the example the following parameters are used:. When using. Note: The above snippet is using.

Another method is. This is an issue if you only have a header row and you want to insert rows after it. To add the data after the header row, assuming this is row 1, you also need to modify the. Quite often when inserting data you want to include formula as part of the row calculation. There are a couple of ways you can do this and if you are writing data then you can include formulas when using.

For example, if you wanted to add a formula that calculated the difference between the two calendar dates you could use the line:. As part of this we are using the loop iterator to build the R1C1 reference, which can get messy if you are appending rows at the end of your data. The pattern for building a.

google script array

Working with structured data like JSON creates better opportunities to flexibly handle data. In the above example there are data values that are more than one level deep. As a sheet is 2D we need to flatten the data. Bruce McPherson has a nice pattern for flattening an object with dot syntaxwhich he has wrapped in a Flattener library source code on Github. Skip to content. For example, if you wanted to add a formula that calculated the difference between the two calendar dates you could use the line: values.

Next Post: Virtual Teams: An open perspective on organisational transformation? By using this site, you agree to its use of cookies and privacy policy Learn more Got it.Hip, Hip Array! Difficult to understand. Yes, yes, and yes, but they are incredibly useful in the right situations.

In a nutshell: whereas a normal formula outputs a single value, array formulas output a range of cells! We could easily do this by adding a formula in column D that multiplies B and C, and then add a sum at the bottom of column D.

However, array formulas let us skip that step and get straight to the answer with a single formula. Now it works, and Google Sheets will output an array with each cell corresponding to a row in the original arrays, as shown in the following image:. Note: array formulas only work if the size of the two arrays match, in this case each one has 4 numbers, so each row multiplication can happen.

In this example, we enter a single formula to multiple an array of row headings against an array of column headings. Again, this only works because the two arrays are the same size:. Click here to get your own copy. Hi Can you use arrayformulas wth text and numbers? You should be able to do it with something like this:. Also, you should change the permissions on your sheet to View-only or turn sharing off again, in case anyone else clicks that link.

Pedro, you are my hero! So I manually have to place the following at the next empty row following whatever that above formula returns to return the current price for today:.

Since the number of rows returned for the first formula varies, I have to delete the last one, let the first formula populate rows, and then place the last formula on the next empty row. Can I use arrayformula or something else to basically append the last formula to the result set of the first formula?

What arrayformula do I use if I want to use the value in A and multiply by diff amounts. For example : A multiplied by 4 for row B, A multiplied by. What would be the syntax if I wanted to use an array formula for the summation of 3 columns together? You can use a standard SUM formula to sum 3 columns together, e. I have this with 10 columns. Is there a way to use array formulas without having to mention each column individually? Am I headed in the right direction, or is this even enough info?Returns only the unique rows in the source array, discarding duplicates.

The rows are returned according to the order in which they first appear in the source array. Returns the number of rows that meet certain criteria within a JavaScript 2d array. Returns the first row in which a specified value can be found in a specific column.

Returns a filtered version of the given source array, where only certain rows have been included. Returns the rows in the given array, sorted according to the given key column.

Transposes the rows and columns in the given array.

Apps Script Basics (5) – Arrays, Logger, Execution Transcript

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Video Tutorials. Terms of Use. Video Tutorial. Reference documentation. Click on the box listing the different versions of the library. Here's a list of contacts:. I want to remove the duplicates, filter to get only the contacts older than 17 years old and sort by City.

Arguments: Nom Type Description data Object[][] a JavaScript 2d array optColumnIndex int the index of the column used to get unique values from a specific column Return Values: Type Description Object[][] the unique rows in the source array, discarding duplicates.

Arguments: Nom Type Description data Object[][] a JavaScript 2d array criteria String the criteria in the form of a character string by which the cells are counted Return Values: Type Description int the number of rows that meet the criteria.

Arguments: Nom Type Description data Object[][] a JavaScript 2d array columnIndex int the index of the column in which the value can be found or -1 to search accross all columns value String the value in the form of a character string Return Values: Type Description int the first row in which the value can be found. Arguments: Nom Type Description data Object[][] a JavaScript 2d array columnIndex int the index of the column in which the value can be found or -1 to search accross all columns value String the value in the form of a character string Return Values: Type Description Object[][] the filtered rows in the source array.

Arguments: Nom Type Description data Object[][] a JavaScript 2d array columnIndex int the index of the column in which the value can be found or -1 to search accross all columns values String[] the values in the form of an array of strings Return Values: Type Description Object[][] the filtered rows in the source array.

Arguments: Nom Type Description data Object[][] a JavaScript 2d array columnIndex int the index of the column in which the value can be found startDate Date the beginning of the time range endDate Date the end of the time range Return Values: Type Description Object[][] the filtered rows in the source array. Arguments: Nom Type Description data Object[][] a JavaScript 2d array columnIndex int the index of the column in which the value can be found min int the minimal value max int the maximal value Return Values: Type Description Object[][] the filtered rows in the source array.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. Using Google Apps Script, is there a way to write the values in a Google Spreadsheet array to a range without looping? Be aware that this method expects a multi-dimensional array, with the outer array being rows and the inner array being columns.

So in your case the data should look like:. Even though it's a bit late, someone might come across this answer at some point. I wrote a function that coerces a 1-d Array into a 2-d Array matrixwhich is what is expected as a parameter to Range.

I can't guarantee that any values except basic data types will be preserved. The sanitization is necessary because JavaScript internally seems to replace empty values in the original Array with null or "null" when it is assigned to be the element of another Array. At least, that's my experience. It works though, someone may find it useful.

google script array

The top answer provides a nice, compact way of writing an array to a ROW but to write to a COLUMN it is a bit harder but since that's the question here, here's a quick function to do it:. I saw this question when researching an answer for my own application. An alternative solution is to use a custom function that returns a 2D array. Here's an example. If you put a reference to a custom function in B1, you can fill the range B1:D2 with individual names.

Note, this function will throw an exception if the cells adjacent to B1 are not empty. Here are four functions: 1 setting a horizontal range of values 2 setting a vertical range of values 3 setting an area of values 4 copying an area of values and pasting it.

Learn more. Asked 7 years, 9 months ago. Active 1 year, 3 months ago. Viewed 79k times. KyleMit Active Oldest Votes. Eric Koleda Eric Koleda I was getting the error "Incorrect range width, was 5 but should be 1 line 5, file "Code" " - and took a look at the provided documentation. I realized I missed the detail that inner arrays are rows, outer arrays are columns. This answer appears to address the question correctly.

Chris Cirefice Chris Cirefice 3, 5 5 gold badges 30 30 silver badges 63 63 bronze badges. I improved script execution time by a factor of 10x. This doesn't seem to answer the OP's question. There is a potential problem with this in that it seems that when there is an error there is no rollback. Perhaps thats why google recommends a different approach. Frank Montemorano Frank Montemorano 1 1 gold badge 5 5 silver badges 11 11 bronze badges. OMG what's the reason to write such useless and nonworking code as an answer here?Posted by bazroberts Apr 20, Apps Script 2.

Plus, the execution transcript, which shows you the steps your code is taking and how long they take.

google script array

Here we have some data in a sheet. Line 6: Then we get the cell at that point in the loop using getRange and a row and a column number. Then we get its value and store it in the variable listOfNumbers. Line 8: Now, still within the loop we log the numbers in the logger.

Google Sheets ARRAYFORMULA, Introductions to Arrays, ARRAY_CONSTRAIN, SORT Functions Tutorial

This is easy to do, just use Logger. Lines 9 and We close the loop with the curly bracket and then the function with another one.

Then press the play button to run the function. The first time you run it you will have to authorise it. Each time placing them in the logger. You can put Logger. Line This time I want to store 4 different names in the variable items.

To do this, I need to set up an array. The contents of an array is shown by whatever is in between the square brackets. So, here we have four names all within one array called items. We often want to get at the information stored in an array. To do so, we need to state in which position in our array is the name we want. In arrays, each item of data has a position, starting in position 0. A common mistake is to forget that arrays are zero-based, i.

We do that by stating the variable name and in square brackets stating its position, e. However, in cell E1 we were expecting to add the contents of items but we only have the first name in the array! This is because the variable items is still a single array, it just happens to contain multiple values mini arrays.

Finally, in cell F1 we wanted to add the second name on the list and we have indeed, so the index we used has worked.

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Then add those values to our sheet and pick out a value from that range and add it to the sheet. I get the range of cells I want to add to. Note, this has to be the same number of cells as the original data, otherwise it will throw an error. So, here I want to get the second item, so I need to state position 1. Then close the function. Note, that this time every number has a set of square brackets around it and that all the data is enclosed within a second set of brackets.

This shows that the data is stored in lots of little arrays within 1 larger array, what is known as an array of arrays. This is why, we can use setValues as here we have multiple items and we can add them to our sheet in one go. This can all sound a bit complicated, but basically, we either have an array on its own. So, 1 array with multiple items in it. Or we have arrays within an array an array of arrays. So, the code knows this array has multiple items, whereas the other one it treats it as a single item.

A useful technique is to loop through an array. Line First, we set up a for loop. This will go from 1 to 4. K1, K2, etc.If you have a list of items a list of car names, for examplestoring the cars in single variables could look like this:.

However, what if you want to loop through the cars and find a specific one? And what if you had not 3 cars, but ? An array can hold many values under a single name, and you can access the values by referring to an index number. The two examples above do exactly the same. There is no need to use new Array. For simplicity, readability and execution speed, use the first one the array literal method. Arrays are a special type of objects. The typeof operator in JavaScript returns "object" for arrays.

Arrays use numbers to access its "elements". In this example, person[0] returns John:. Objects use names to access its "members". In this example, person. You can have objects in an Array. You can have functions in an Array. You can have arrays in an Array:. The length property of an array returns the length of an array the number of array elements. The length property is always one more than the highest array index.

How do array formulas work in Google Sheets?

The easiest way to add a new element to an array is using the push method:. New element can also be added to an array using the length property:. Adding elements with high indexes can create undefined "holes" in an array:. If you use named indexes, JavaScript will redefine the array to a standard object.

After that, some array methods and properties will produce incorrect results. There is no need to use the JavaScript's built-in array constructor new Array.

google script array

The new keyword only complicates the code. It can also produce some unexpected results:. The problem is that the JavaScript operator typeof returns " object ":. To solve this problem you can create your own isArray function:. Or more precisely: it returns true if the object prototype contains the word "Array". The instanceof operator returns true if an object is created by a given constructor:.


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