The NOW formula provides a date and time stamp at the time of execution or when the NOW() function is entered into the sheet.
The TODAY formula provides just the date at the time of execution or when the TODAY() formula is entered into the sheet.
That’s all well and good but I want this formula to occur when a user enters something in a cell.
To achieve this, we can use an IF statement. First, we will state if the cell is empty, then no date should appear. However, if the cell has a value in it, then the date and/or time the value was entered will appear in the corresponding cell.
Here’s the formula:
=IF(A2="","",TODAY()) <<Formula is celll D2
ِAs you can see in the IF statement we are saying; if there is nothing in cell A2 then don’t do anything, otherwise if it contains a value then add today’s date in this cell, D2.
Now, if you want to have this ready for all rows for when a user adds to your data, then drag the formula all the way down to the bottom of the sheet.
Here is an example:
Ready to add some data? Here is what is would look like:
The NOW() and TODAY() functions are Dynamic. This means that they will update automatically. To keep these dates from changing, copy the cell and press <CTRL>+<SHIFT>+<V> or paste special> paste as value.
A Warning on NOW() and TODAY()
These two functions are Dynamic and will update constantly. If you are looking to get the date or time of something so that it does not update automatically then check out this tutorial :
I was trying to rush out some Google Apps Script code to deal with a task on Google Sheets recently. Basically, I had to search through a heap of data and find certain values and do something too them.
My column was reaching across the page to something like Column BK and my rows were over 1000 deep. Running this code was taking forever!!!
My immediate instinct was:
What have I done wrong?
…and my instinct was right.
The Good and Bad Way to Search Through Code
So after looking at my code again, I discovered that for some reason I go it into my head that I should be searching each cell for the value I needed and then doing something with it.
Sounds logical right? It’s sorta what you are meant to do.
The problem is that I was calling the sever and asking for the range in each cell as I was looping through the entire document. This is super costly and inefficient in terms of time.
Also, if you do run a costly code like this, then you will get a little red light in your Script tool bar that represents your Execution Hints:
Clicking on Execution Hints and expanding the side bar with provide you with a far-too-deserving-polite dressing down about your slow and server costly code.
So instead of calling the server for each cell I need to get the full range of the data I am working on, search through it client-side to find what cells require modifying and then invoke the modifications.
Let’s look at a simple example:
In this example I want to search through all the results over multiple quizzes and if there is a dash “-” or a zero “0” change the background accordingly.
Yeah! Yeah! I can do this with conditional formatting, but this is an example, damn it, Jim!!!
Below is a sample of the data I will use and here is the link.
Both Good and Bad examples have the same end result. The result should look like below:
Hopefully everything is self-explanatory here. We call the spreadsheet first and then look for the active sheet. Inside the active sheet we want the range of the data (rangeData) which will contain all the data in the range. We will use that data to get the last row and column number of the data. Finally we will call the server to get he range we want to work with (searchRange).
Once done, we will create our function, onOpen(). When it is called it will create a menu called Checker with the sub menu Bad Way and Good Way. This isn’t necessary, but it might be easier for you to physically test the difference in the slow method versus the fast (correct) one.
The Bad Way
As mentioned above in the Bad (slow) Way we call the server each time to look at what is in a cell.
The Bad Way
BAD - Go to each cell and see if it contains a value
and then fill in the background if it contains a dash or
//Loop through each column and each row in the sheet.
As I loop across the columns and then the rows, I am using my search range to get the value of the cell in Line 25. This means I am contacting the server a total for 436 times. This significantly slows things down.
The Good Way
GOOD - Create a client-side array of the relevant data
search through the array and if there is a dash or zero,
then add the relevant background color.
// Get array of values in the search Range
// Loop through array and if condition met, add relevant
// background color.
In the preferred approach I am taking the array that I created from searchRange.getValues() in Line 36 and searching through it before I make my calls to change the background when a dash or a zero occurs.
Why is this better?
I only make server call to collect the range data once. Then client-side (on my computer in this instance), I do all my searching before calling Google who collects all the changes in a cache until the loops are done before creating background colors all at once.
Take a look at the speed differences over ten tests:
The Good Way is the clear winner. You can try it out for yourself if you have been playing along by going to <View><Execution Transcript> in the Script
The take home from this is that, make as little calls to the server as possible. It significantly improves your speed.
Ever been faced with an issue where you can’t move your column to the far left in order to Vlookup? I just came across this issue recently.
The Problem – Vlookup
I needed to add teachers to a list of students who had to move into their class for two tests because their teacher (Hanna John-Kamen) would be absent on the test day.
Essentially, I was splitting the students into the remainder of the classes for that session time. In this student list sheet (Hannah 302-15) I had allocated the students new rooms and each room had a new teacher.
I couldn’t change the teacher proctors test list sheet ( Q2U1 Teacher) because the teachers who reference it would get confused. Unfortunately the teachers name I wanted was in column B and the reference (The Speaking classroom) was in column I.
I need to put my first Vlookup in M2 of the Hannah 302-15 sheet. If I tried to Vlookup it might look like this: =VLOOKUP(L2,‘Q2U1 Teacher’!B:I,–8,False). Where L2 is the class I am searching for in the Hannah 302-15 sheet. ‘Q2U1 Teacher’!B:I is the range where B is the name column and I is the Class number. –8 is clearly wrong. Vlookup will not accept a negative reference (It’s stupid, I know). False: because the list was not sorted.
Spacer is a Free Google Add-On that creates row spaces by column categories.
I use it as an academic administrator to create a space or two at the end of each class section to create a visual break between sections. This makes it easier for my staff to quickly identify class sections.
Allow you to select a column with the categories you want to use to space your data.
Set the height of your header – so that is not spaced too.
Set the thickness of your spaces.
Set the color of your spaces
Set starting and end position of your color filler.
How to use Spacer
Before You Start:
Before you start, create a Google Sheet with the data in it you want to space.
Select All the data.
Go to the menu bar and select: Data>Sort Range... and select the column you want to sort by. This will be the column you will use to space your data by the categories in that column.
In a Google Sheet, select the Add-Ons menu.
Select: Spacer>Create Spaces
A sidebar will appear to the right.
Choose the column you want to use to Space your data.
Choose how high your header is.
Chose how thick or deep your want your header to be.
If you want a color, select a color that you want to add to your spaces.
Select where you want to start the color and end the color.
If you are not happy with the color, space, color width or made a mistake, simply click: UNDO
I keep getting the following popup:
This is because the starting value of your Color Width is greater than your End value:
I have a list of people with their favorite color and fruit. Let’s say I want to sort the Google Sheet by favorite color (Fav Color) and put a space at the end of each color category to make it easier to read.
My data looks like this:
To space this data we must do the following:
Select all the data: ctrl+shift + a
Sort the data by column B. Select: Data> Sort range
Click the: Data has a header row tick box. Select the column: Fav Color. Then click the Sort button.
Your data is now sorted by favorite color:
Time to use the Spacer. Select: Add-ons > Spacer > Create spaces
Spacer will open at Sidebar on the right:
We want to space our data by Fav Color which is column B. For Column, select: B
We have a single Row Header so we can leave the header selection at 1:
We want to give our spaces a thickness of 2 rows:
Next, we choose a color. Let’s choose purple. A color picker will pop up (the picker may vary depending on your system) select the color and click: OK:
This is the result:
Now choose where to start and finish the color fill for the space. I’ll start it at column A and end it at column E.
You sure can. Google has a fully supported script editor that you integrate with your Sheets, Docs, Forms, Slide, Gmail, Calendar and pretty much every aspect of the Google Suite. It’s name: Google Apps Script.
Google Apps Script allows you to do all sorts of things like building short code to modify sheets and docs, create macros, develop add-ons mess around with gmail and so much more.
You know, I’m pretty confident in my use of Google Sheets. I use a lot of it’s advanced features and formulas in my daily work.
But one thing was bugging me. Every time I created a formula and then grabbed and dragged (or double clicked) that little box in the bottom right of the cell to have it repeat, the cells would change.
This normally is great, because it moves by a cell each time and makes my life easier.
What if I want to keep a certain cell constant in a formula?
Enter the Absolute Reference.
The absolute reference allows you to lock either or both aspect of the cell. That is it can lock the column and/or the row. This is done by simply adding a “$” before the column or row. Here is how we do it:
$A$1 – locks both Column and Row
$A1 – locks only the Column
A$1 – locks only the Row
Awesome!!! Now you can drag that little square wherever you want and whatever part of that cell you locked wont change while everything else will.
F4 – The Shortcut From the Gods
So, this is all well and good, but it still means that after I have finished entering the whole formula, I have to go back into the cell and change the cell value with that dollar sign “$”.
F4 to the rescue. You can change the value live here by cycling through $A$1, $A1 and A$1 before continuing with your formula. While completing a formula simply,
click a cell or range you want to get a value from and you want to lock or make an Absolute Reference.
Press <F4> until you get the desired Absolute Reference combination.
Continue with the rest of your formula.
Example – My Fruit Binge
I really love fruit (Okay, I’m ambivalent about fruit, but I am trying to sell the example here!)
I have a list of fruit that I have eaten in the last hour. My wife has caught me with a pile of cores and skins scattered around me and wants me to count how much this food binge cost me in order to make me feel bad.
Of course, I immediately run to my laptop and bring up my list of fruit I just ate. I can also remember how much each item costs (Yep, the example is breaking here, stay with me).
To work out the total costs of what I ate, I will count how many of each item and multiply that by the costs of each item.
Here is my Google Sheet so far:
Lets plug in the formula to count the total number of Bananas.
Things look good so far. In cell G3 I have run countifand selected the range C2:C13. And I only want it to count if the cell contains the text “Banana” which I indicate by cell E3. Finally, in cell H3 I multiply the total number of times Banana appears (G3) by the cost of the item (F3).
The end results:
Just for shits and giggles, lets see how that countif formula will work if I drag it down with that cheeky little box in the bottom right of the cell.
As you can see things have gone a bit Pear-shaped (nailed it!) here. We can see 2 pairs in the list in column C but the formula is only counting one in cell G7.
Let’s take a look at the formula in G7.
We can see here that the range has changed from C2:C13 to C6:C17. That is not helpful at all. We need to make these into an Absolute Reference. The fruit criterion also moved, but we wanted it to come down to read Pear so that is pear-fict (Not so good that time).
Let’s fix this up. We need to change the countif range in cell G3 to an Absolute Reference from C2:C13 to $C$2:$C$13. This is kinda awkward so let’s try that <F4> shortcut out and put in the formula again fresh. To do this I did the following steps.
selected the range C2:c13
hit the magical <F4> button once and it created: $C$2:$C$13
entered a comma: ,
selected the range E3
closed the bracket: )
Looks good. We’ll grab that little box down the bottom again and drag (or double click) it down and see if we get that extra pear.
Boom! It worked. We now see 2 pears counted. Check out that bottom cell. It’s lock in the range value and only changes the fruit criterion.
Just to be pear-dantic (Hey! That was okay!) let’s see how guilty we should be for our fruit binge.