Lets start the week with a quick tip.
Lets say you have a list of employees and their birthdays. Now you want to sort this list, based on their birthday, not age. How would you do it?
Sorting by day and month alone:
- Add a column next to original dates. Lets call this Birthday.
- Then, calculate birthday in current year for everyone.
- Assuming DOB is in B1, Formula for birthday (in current year) would be,
=DATE(YEAR(TODAY()),MONTH(B2),DAY(B2)) - This formula gives you a date which has same year as TODAY(), same month & day as original date.
- Then, fill down the formula for all rows.
- Now sort this new column (Birthday) in chronological order.
- You are done!
Note: if you are using tables, then use this formula.
(Assuming original date is in DOB column),
=DATE(YEAR(TODAY()), MONTH([@DOB]),DAY([@DOB]))
Related: Introduction to Tables & Structural References.
More Sorting Examples:
- Sorting sideways
- Sorting in Olympic medals table style, Formula 1 racing style
- Rounding and sorting data
- Checking if a list is sorted using formulas
- Sorting text values using formulas
Homework for you:
If you think sorting by birthdays is easier than eating a birthday cake, then I have a challenge for you. Assuming a list of data of births is in the range A1:A100, write a formula to find how many birthdays are in this month?
Go ahead and post your answers in comments.
8 Responses to “What is LAMBDA? 4 Practical examples to REALLY understand it”
Thanks so much for this, it's utterly brilliant!
Silly question - I assume LAMDA will work with dynamic arrays?
Very much so. Many of the new functions like MAP only make sense in the context of dynamic arrays and Lambda functions.
As usual, very informative material. Easy to understand and apply!
Thanks for making everyone awesome!
Easy to understand Lambda function through this tutorial. Thanks Chandoo.
I have Officce 365 (updated), but I can't see LAMBDA function. 🙁
I dont see "Office Insider" option in my excel 365.
Another option for First Monday...
=LAMBDA(anydate,WORKDAY.INTL(EOMONTH(anydate,-1),1,"0111111"))
Loving the binary options in WORKDAY.INTL David...