Category: VBA \ Excel

VBA is not a scripting language… Not at all!

VBA – Hashing in Excel with HMACSHA1

Hashing strings in general is useful. It is one of the good things, that we get from granted by the various .Net libraries and we should not try to do on our own, as the HMACSHA1 is quite a powerful

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VBA – Convert Excel Column Number to Letter and Letter to Column Number

Converting Excel column number to letter and letter to column number is actually something that every VBA developer does at least once a day. The easiest way is probably to use the property .Column or .Address of the range object that

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Excel – Index(Match) based on multiple columns

Everyone knows the feeling that they need to use the =Index(Match(),Match()) formula in Excel and something tiny was not enough to reach their goal. Some time ago I knew that something is missing I was trying to “filter” with the

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How to fix – This workbook contains one or more links that cannot be updated…

Ok, if you are visiting this article, then probably the reason is that you have received the following messagebox upon openning of Excel: And after looking all over your cells, with both VBA and “Find”, you have not found anything

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VBA – Nested Dictionary

Nested dictionary means a dictionary within a dictionary. Some days ago last week I was trying to build one and it took me some solid 15 minutes to do it, thus I have decided that it is worth an article

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VBA – Folders and Files Functions

Check if folder is empty:

Delete all files in a folder:

Create text file in a given path with text:

All together:

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VBA – Source Control with Git – Video

VBA and source control? Do you know what is VBA? Are you sure we can source control the code, that resides in Excel? Oh, you mean that lengthy way of extracting the modules one by one? But why? Don’t you

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Using API calls with VBA and Python to Read and Write to a Database

Using API calls with VBA and Python to write a database is actually a pretty decent architecture. Here, I would like to say that “It takes the best of the both worlds”, but the truth is that it takes the

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VBA – Compute All Combinations of a Given Set

Yesterday I received an email, refering to some 2 old articles in VitoshAcademy for nested loops without recursion: VBA – Nested loops with recursion (Permutations)  VBA – Avoid nested loops with recursion (Part 2) As far as the person from

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VBA – Cells and Ranges in Excel – Video

Cells and ranges in Excel are quite interesting, as these will always give some points to think of. About an year, after writing the article about VBA – Cells and Ranges in Excel (A bit more than the standard story),

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VBA – How to locate a value in an Excel row?

Most probably you feel like you have a good clue already how to locate a value in a given Excel row. There are plenty of ways – Find() , looking through the cells one by one, looking through the Internet for

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How to declare as decimal in VBA

More than 3 years ago, I wrote an article about floating point numbers in Excel and a tiny problem with those, concerning all floating point numbers. This article is actually a nice one and it is worth reading – What

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VBA – Convert Month Name to Number and Vice Versa

Convert number to name – [3 -> March] Converting month number to name in VBA is actually coming out of the box with the MonthName() function, which is built-in the stanard VBA  library:

The result is not flabbergasting, but

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VBA Debugging – Video

I have decided to make a 19 minute YouTube video, to explain the basics of VBA debugging, as there are quite a few tricks that not everyone knows. The agenda: Properties Window -> F4 Immediate Window -> Ctrl + G

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VBA – Copying Excel worksheet to a new workbook without leaving the old Excel reference

Copying excel worksheets around is actually a piece of cake for a VBA developer (or so they/we think). Mainly because you can record the actions and then “learn” from them, editing a bit the code and etc. Well, there is

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VBA – Copy Worksheet

Copying worksheet in VBA is actually a trivial task – use the macro recorder see the code and use it further. Anyway, if you are coding professionally with VBA (yup, we still exist:), you somehow get stomach problems, whenever you

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Python – The End of the Matrix Wandering

Ok. This article is for all the people, who have written code like this one:

When they were solving a problem like this one: You know who you are. You are probably thinking what is wrong with it? After

VBA – String.Format or how to put variables in a string

C#, Python, Java and all the other “fancy” languages have a built-in method, which writes variables into a string. VBA does not have one. Depending on why do we need it, and if we can guarantee that no injection would

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VBA – Make a list of the formula errors in an Excel

Errors in Excel are different – from “Division by Zero” (#Div/0) and #Name to #REF! and #Num.  There are lots of ways to summarize these into some kind of report and in the current article I will show the VBA

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VBA Boilerplate

Dreaming of having a boilerplate for Excel VBA project? Or you have other dreams, which are more normal? Well, I cannot help in the latter case, but if you want a boilerplate for VBA – here it is!

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Writing data from text file to Excel cells

There are quite a few methods for writing data from a text file to Excel. The main are the following: Through a Query Table Through opening the text file and Reading and writing line by line Reading the text file,

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VBA – Extracting financial data from a website in table format

Although there are plenty of other tools for extracting data from a website (take a look at Beautiful Soup), VBA is somehow good, because … well, because it is somehow challenging to do it every time. Yesterday, I answered a

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Excel – How to build magic square with VBA, following Python Mod Mathematics

Some 4 years ago I wrote an article for calculating magic square with python. What the article did was actually checking whether the square is magic, and not calculating a new one. This one is going to show how these

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Dynamic dropdown list in Excel VBA with variables

Dropdown lists in Excel usually are built from a range or from a variable list. Dropdown list from Excel Range Thus, building a dynamic dropdown list may include building a dynamic range, with undeclared end. Thus, let’s imagine that the

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Write Formulas in Excel through Python XlsWriter

Writing formulas with Excel with Python is a technique, that needs some practice, actually. Although XlsWriter has some good documentaion, not a lot is covered on the point, that concerns creating a file with a formula in it. First and

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Python – The birthday paradox algorithm

The birthday paradox is an interesting problem, mainly because of its somehow “unexpected” results. The problem usually is stated as the following: What is the minimum number of people in a room, in order to have a probability higher than

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VBA – How to implement workbook events in Excel – GIF

The Excel Workbook object is a part of the Workbooks collection. The events are the code, which is “activated” or “triggered”, once a specific event happens. These events are different and could be unlimited, but there are a few built-in Workbook

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VBA – How to avoid naming variables with non-latin alphabet characters (special letters)

Writing code in the local language is actually taught by about 100% of the German VBA books, which I have read. Which is “kind of ok”, if the VBA code only works on German computers. However, if this is not

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VBA – Color Only Half of the Border of an Excel Cell

Coloring the border of an Excel cell is a trivial task. The LineColor feature in Excel is easy to use out of the box: However, whenever half of the cell needs to be colored, the trick is a bit more tough

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VBA – Longest Palindromic Subsequence Algorithm with Excel – GIF

After writing about the longest palindromic substring, now it is time to see the longest palindromic subsequence. What is the difference? Pretty much, if we take the word abracadabra: the longest substring is ada in abracadabra the longest subsequence is

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