I have little to no coding knowledge, so apologies if the solution is too obvious!
I am trying to add a Last Modified column to a Google Sheets file. To do this, I am using an AppScript function with the following code:
function setTimestamp(x) {
if(x != ""){
return new Date();
}
}
This works fine when I use setTimestamp(x) in my file. However, I am combining this with a Zapier action that creates a new row whenever new media is added. Every time a new row is created, any existing formulas are removed.
I assume I need to use ARRAYFORMULA to apply the setTimestamp formula to newly-created rows, but it must only apply to rows that aren't blank.
I have tried the following:
={"Last Modified";ARRAYFORMULA(setTimestamp(A2:A))} -> Only worked on first row
={"Last Modified";ARRAYFORMULA(B2:B=setTimestamp(A2:A))} -> Broke the file
={"Last Modified";ARRAYFORMULA(IF(A2:A)=1,setTimestamp(A2:A),"")} -> Expected 1 argument, got 3
Is there a way I can combine the IF into the script or a better way to solve the problem?
A public version of my file is available here: https://docs.google.com/spreadsheets/d/13zkVRPr2Wh5bHjCT8cenInHnBk7qkMkuEMdwUxC_cRU/edit?usp=sharing
All data is dummy data and stock photos.
Unfortunately, arrayformula does not function as an array map function for custom functions. (Even for native functions where you may expect it to work that way, it does not always, sadly.)
To handle array range, we need the custom function to handle array range directly. That also limits the number of individual calls to custom functions, which materially saves execution time.
To handle array range, there are 2 ways. I'll comment on both.
Array range directly as input of custom function
If the input is a single cell, it is read directly
If the input range spans more than a single cell, the data is read as nested lists: a list of lists of rows.
For example, A1 will be read as the data in A1. A1:B2 will be read as [[A1, B1], [A2, B2]].
You can remember it as columns of rows.
As for the input data format, numbers are taken without the display format. Texts are taken as strings.
If output is an array range, the result will automatically expend.
Thus, in your example, in B2 you can almost do
=setTimestamp(A2:A)
where setTimestamp() has been modified to
function out = setTimestamp(arr) {
out=Array(mat.length);
for (i=0;i<mat.length;i++){
j=0
if(arr[i][j] != ""){
out[i]=new Date();
}
}
return out
}
For more details, see the official help page. (Over the years, more details have become available.)
Almost, but not quite. For your direct question, above provides the answer. However, you seem to have an implicit requirement that your custom function is executed every time a new URL is found. Be careful that what happens here is that every time Google Sheet updates cell content, a new Date() is created and outputted.
Array range read within custom function
Since you know your URLs are in A2:A, and you want the output of your custom function to be B2:B, you can read and modify those ranges directly within your custom function via the Range Class.
In this route, you may find getLastRow(), getLastColumn() in Sheet and getNextDataCell() in Range convenient.
When you need to execute your custom function, you can run it manually or add onEdit() trigger to your custom function. (But onEdit() itself can mean substantial UI lag when using the sheet. It's usually more appropriate for sheets that parse external data automatically. See other triggers in the link for motions.)
In your example, you can almost do
function setTimestamp() {
var ss = SpreadsheetApp.getActiveSpreadsheet();
var sheet = ss.getSheets()[0];
var lastRow = sheet.getLastRow();
var row=1;
var cell = sheet.getRange(row,1).getValue();
while (row<=lastRow) {
if(cell.getValue() != ""){
sheet.getRange(row,2).setValue(new Date());
}
cell = sheet.getRange(row,1,lastRow).getNextDataCell(SpreadsheetApp.Direction.DOWN);
row=cell.getRow();
}
}
which will scan for all URLs in A2:A and write current time to B2:B when executed.
Again, your example implicitly points to updating only when a new URL is found. So be careful about that. Use triggers as needed.
As for the need to place formula in B1, you can (and should) reference the output of your other application in a different sheet so that you or a different application of yours can edit without conflict.
Thus, for what was asked, we have everything.
In a cell I have a list of locations made with data validation. Example Budapest, Belgrade, Bucharest.
next to the cell I have formula that i have to change manually if i change the cell with the location, EX: =index( Budapest!I:I; max(if(Budapest!B:B=E127; row(Budapest!B:B)))), =index( Belgrade!I:I; max(if(Belgrade!B:B=E127; row(Belgrade!B:B))))...etc
Is it a way to change automatically the formula, for ex if I select the city Budapest the formula to change to Budapest.
I have tried: =if(F127="Budapest"index( Budapest!I:I; max(if(Budapest!B:B=E127; row(Budapest!B:B))))) if(f127="Belgrade"index(Belgrade!F:F; max(if(Belgrade!B:B=E127; row(Belgrade!B:B)))))
if A1 = Bucharest (or whatever else) use:
=INDEX(INDIRECT(A1&"!I:I"); MAX(IF(INDIRECT(A1&"!B:B")=E127; ROW(INDIRECT(A1&"!B:B")))))
Depending on where the input data is will determine what the best formula to use it. But to be vague, the answer is yes. It will most likely require you to use a formula that pulls data and instead of the putting in a location of where to pull from, put a cell reference. Some formulas wont let you use a cell’s contents to reference a location. In that case you can concatenate the string from a cell into the formula. Here is an example of concatenation within a formula that does not allow cell references (query select where).
=QUERY('tab1'!$A$4:$R, "select * where A = '"&$C$5&"'")
It pulls all data where column A matches whatever value is typed into cell C5.
I understand this formula does not match your data but it provides an explanation of the mechanism of how to do so. I hope it helps. If not, please provide an example sheet and I can create a specific formula for your situation.
I'm using an IFS statement to decide what a cell should use as a value dependant on what is entered into the cell.
Which is fine, except that I have to hard code it into every cell that uses it as an equation.
I need to have the Value1, Value2 etc be whatever is in another cell. That way I can update one cell and have it cascade.
=IFS(C34=<100, "$10", C34=500, "$5", C34=1000, "$2")
I need the "$10" to be a value of another cell, ie B28
I've tried !B28, $B28, =(B28) and every other thing I could think of. I can't find anything online in Google's documentation.
try:
=IFS(B1<=100, "$15.75", B1<=1000, "$8.41")
=IFS(B1<=100, D1, B1<=1000, "$8.41")
The following illustration should help:
Here is what I found for Google Sheets:
To get the current sheet name in Google sheets, the following simple script can help you without entering the name manually, please do as this:
Click Tools > Script editor
In the opened project window, copy and paste the below script code into the blank Code window, see screenshot:
......................
function sheetName() {
return SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getName();
}
Then save the code window, and go back to the sheet that you want to get its name, then enter this formula: =sheetName() in a cell, and press Enter key, the sheet name will be displayed at once.
See this link with added screenshots: https://www.extendoffice.com/documents/excel/5222-google-sheets-get-list-of-sheets.html
You have 2 options, and I am not sure if I am a fan of either of them, but that is my opinion. You may feel differently:
Option 1: Force the function to run.
A function in a cell does not run unless it references a cell that has changed. Changing a sheet name does not trigger any functions in the spreadsheet. But we can force the function to run by passing a range to it and whenever an item in that range changes, the function will trigger.
You can use the below script to create a custom function which will retrieve the name:
function mySheetName() {
var key = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getName();
return key;
}
and in the cell place the following:
=mySheetName(A1:Z)
Now if any value in a cell in that passed range changes the script will run. This takes a second to run the script and sets a message in the cell each time any value is changed so this could become annoying very quickly. As already mentioned, it also requires a change in the range to cause it to trigger, so not really helpful on a fairly static file.
Option 2: Use the OnChange Event
While the run time feels better than the above option, and this does not depend on a value changing in the spreadsheet's cells, I do not like this because it forces where the name goes. You could use a Utilities sheet to define this location in various sheets if you wish. Below is the basic idea and may get you started if you like this option.
The OnChange event is triggered when the sheet name is changed. You can make the code below more sophisticated to check for errors, check the sheet ID to only work on a given sheet, etc. The basic code, however, is:
function setSheetName(e) {
var key = SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getName();
SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getRange('K1').setValue(key);
}
Once you have saved the code, in the script editor set the Current Project's On Change Trigger to this function. It will write the sheet name to cell K1 on any change event. To set the trigger, select Current project's triggers under the Edit menu.
If you reference the sheet from another sheet, you can get the sheet name using the CELL function. You can then use regex to extract out the sheet name.
=REGEXREPLACE(CELL("address",'SHEET NAME'!A1),"'?([^']+)'?!.*","$1")
update:
The formula will automatically update 'SHEET NAME' with future changes, but you will need to reference a cell (such as A1) on that sheet when the formula is originally entered.
Not using script:
I think I've found a stupid workaround using =cell() and a helper sheet. Thus avoiding custom functions and apps script.
=cell("address",[reference]) will provide you with a string reference (i.e. "$A$1") to the address of the cell referred to. Problem is it will not provide the sheet reference unless the cell is in a different sheet!
So:
where
This also works for named sheets. Then by all means adjust to work for your use case.
Source: https://docs.google.com/spreadsheets/d/1_iTD6if3Br6nV5Bn5vd0E0xRCKcXhJLZOQqkuSWvDtE/edit#gid=1898848593
EDIT:
I've added another workaround in the document that makes use of =formulatext() and some traditional text functions. By referencing to a cell in the current sheet using it's full address, i.e. Sheet1A1 you are able to use formulatext() to extract only the sheet name.
Here is my proposal for a script which returns the name of the sheet from its position in the sheet list in parameter. If no parameter is provided, the current sheet name is returned.
function sheetName(idx) {
if (!idx)
return SpreadsheetApp.getActiveSpreadsheet().getActiveSheet().getName();
else {
var sheets = SpreadsheetApp.getActiveSpreadsheet().getSheets();
var idx = parseInt(idx);
if (isNaN(idx) || idx < 1 || sheets.length < idx)
throw "Invalid parameter (it should be a number from 0 to "+sheets.length+")";
return sheets[idx-1].getName();
}
}
You can then use it in a cell like any function
=sheetName() // display current sheet name
=sheetName(1) // display first sheet name
=sheetName(5) // display 5th sheet name
As described by other answers, you need to add this code in a script with :
Tools > Script editor
An old thread, but a useful one... so here's some additional code.
First, in response to Craig's point about the regex being overly greedy and failing for sheet names containing a single quote, this should do the trick (replace 'SHEETNAME'!A1 with your own sheet & cell reference):
=IF(TODAY()=TODAY(), SUBSTITUTE(REGEXREPLACE(CELL("address",'SHEETNAME'!A1),"'?(.+?)'?!\$.*","$1"),"''","'", ""), "")
It uses a lazy match (the ".+?") to find a character string (squotes included) that may or may not be enclosed by squotes but is definitely terminated by bang dollar ("!$") followed by any number of characters. Google Sheets actually protects squotes within a sheet name by appending another squote (as in ''), so the SUBSTITUTE is needed to reduce these back to single squotes.
The formula also allows for sheet names that contain bangs ("!"), but will fail for names using bang dollars ("!$") - if you really need to make your sheet names to look like full absolute cell references then put a separating character between the bang and the dollar (such as a space).
Note that it will only work correctly when pointed at a different sheet from the one that the formula resides! This is because CELL("address" returns just the cell reference (not the sheet name) when used on the same sheet. If you need a sheet to show its own name then put the formula in a cell on another sheet, point it at your target sheet, and then reference the formula cell from the target sheet. I often have a "Meta" sheet in my workbooks to hold settings, common values, database matching criteria, etc so that's also where I put this formula.
As others have said many times above, Google Sheets will only notice changes to the sheet name if you set the workbook's recalculation to "On change and every minute" which you can find on the File|Settings|Calculation menu. It can take up to a whole minute for the change to be picked up.
Secondly, if like me you happen to need an inter-operable formula that works on both Google Sheets and Excel (which for older versions at least doesn't have the REGEXREPLACE function), try:
=IF(IFERROR(INFO("release"), 0)=0, IF(TODAY()=TODAY(), SUBSTITUTE(REGEXREPLACE(CELL("address",'SHEETNAME'!A1),"'?(.+?)'?!\$.*","$1"),"''","'", ""), ""), MID(CELL("filename",'SHEETNAME'!A1),FIND("]",CELL("filename",'SHEETNAME'!A1))+1,255))
This uses INFO("release") to determine which platform we are on... Excel returns a number >0 whereas Google Sheets does not implement the INFO function and generates an error which the formula traps into a 0 and uses for numerical comparison. The Google code branch is as above.
For clarity and completeness, this is the Excel-only version (which does correctly return the name of the sheet it resides on):
=MID(CELL("filename",'SHEETNAME'!A1),FIND("]",CELL("filename",'SHEETNAME'!A1))+1,255)
It looks for the "]" filename terminator in the output of CELL("filename" and extracts the sheet name from the remaining part of the string using the MID function. Excel doesn't allow sheet names to contain "]" so this works for all possible sheet names. In the inter-operable version, Excel is happy to be fed a call to the non-existent REGEXREPLACE function because it never gets to execute the Google code branch.
I have a sheet that is made to used by others and I have quite a few indirect() references around, so I need to formulaically handle a changed sheet tab name.
I used the formula from JohnP2 (below) but was having trouble because it didn't update automatically when a sheet name was changed. You need to go to the actual formula, make an arbitrary change and refresh to run it again.
=REGEXREPLACE(CELL("address",'SHEET NAME'!A1),"'?([^']+)'?!.*","$1")
I solved this by using info found in this solution on how to force a function to refresh. It may not be the most elegant solution, but it forced Sheets to pay attention to this cell and update it regularly, so that it catches an updated sheet title.
=IF(TODAY()=TODAY(), REGEXREPLACE(CELL("address",'SHEET NAME'!A1),"'?([^']+)'?!.*","$1"), "")
Using this, Sheets know to refresh this cell every time you make a change, which results in the address being updated whenever it gets renamed by a user.
I got this to finally work in a semi-automatic fashion without the use of scripts... but it does take up 3 cells to pull it off. Borrowing from a bit from previous answers, I start with a cell that has nothing more than =NOW() it in to show the time. For example, we'll put this into cell A1...
=NOW()
This function updates automatically every minute. In the next cell, put a pointer formula using the sheets own name to point to the previous cell. For example, we'll put this in A2...
='Sheet Name'!A1
Cell formatting aside, cell A1 and A2 should at this point display the same content... namely the current time.
And, the last cell is the part I'm borrowing from previous solutions using a regex expression to pull the fomula from the second cell and then strip out the name of the sheet from said formula. For example, we'll put this into cell A3...
=REGEXREPLACE(FORMULATEXT(A2),"='?([^']+)'?!.*","$1")
At this point, the resultant value displayed in A3 should be the name of the sheet.
From my experience, as soon as the name of the sheet is changed, the formula in A2 is immediately updated. However that's not enough to trigger A3 to update. But, every minute when cell A1 recalculates the time, the result of the formula in cell A2 is subsequently updated and then that in turn triggers A3 to update with the new sheet name. It's not a compact solution... but it does seem to work.
To match rare sheets names like:
Wow!
Oh'Really!
''!
use the formula:
=SUBSTITUTE(REGEXEXTRACT(CELL("address";Sheet500!A1);"'?((?U).*)'?!\$[A-Za-z]+\$\d+$");"''";"'")
or
=IF(NOW();SUBSTITUTE(REGEXEXTRACT(FORMULATEXT(A1);"='?((?U).*)'?![A-Za-z]+\d+$");"''";"'")) if A1 is formula reference to your sheet.
if you want to use build-in functions:
=REGEXEXTRACT(cell("address";'Sheet1'!A1);"^'(.*)'!\$A\$1$")
Explanation:
cell("address";'Sheet1'!A1) gives you the address of the sheet, output is 'Sheet1'!$A$1. Now we need to extract the actual sheet name from this output. I'm using REGEXEXTRACT to match it by regex ^'(.*)'!\$A\$1$, but you can either use more/less specific regex or use functions like SUBSTITUTE or REPLACE
I am using Google Spreadsheet function.
This formula works fine.
=ImportXML("https://www.google.com/finance?q=SHA:000001", "//span[#class='pr']")
The string SHA:000001 is contained in cell B4. I would like to use cell reference. So, I changed to formula to
=ImportXML("https://www.google.com/finance?q=" + B4, "//span[#class='pr']")
Unfortunately, this did not work. The value returned is #VALUE!. How should the correct formula look like?
You need to use an ampersand not a plus sign:-
=ImportXML("https://www.google.com/finance?q="&B4, "//span[#class='pr']")