Reading and writing to an Excel ActiveX textbox with Python can be fun. If you really do not have anything better to do. Anyway, if this is your current task, you are on the correct place to see how it…
Tag: Excel
VBA – Printing Dictionary of a Dictionary of a Dictionary…
Working with dictionaries in VBA is a bit more unpleasant, than working with dictionaries with almost any other language. Because of the VBA IDE, you only see the keys, but not the values. Thus, if you have experience with Visual…
VBA – Automatically Save Excel File with VBA
Saving Excel files, when working with VBA is unfortunately a bit of pain the ass. You always need to make a new version every now and then, because it does not matter how seasoned VBA developer you are, still there…
VBA – Ubound of Multidimensional Array or How to Get What We Need?
Transforming Range to Array in VBA is actually a one liner – we take the range and we assign it to a variant:
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Dim myRange As Range Set myRange = Range("a1").CurrentRegion Dim myArray As Variant myArray = myRange |
The “strange” part is that the array is converted to 2-dimensional array after this: and working…
VBA and Python – Intersection of dictionaries
Intersection of dictionary (or of any two lists) is a list with elements, that are present in both other lists. Thus, if we have the following 3 dictionaries in Python:
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dict_a = dict([('aa', 4139), ('bb', 4127), ('cc', 4098)]) dict_b = dict(aa=4139, bb=4127, ee=4098) dict_c = {'aa':12, 'bb':13, 'dd':23} |
Then, an intersection of their keys will contain only…
VBA – IIF() vs IF()
What is the difference between IIF() and IF() in #VBA? The idea of IIF() is that it evaluates both the True and the False part of the condition, before evaluating the condition itself. Thus, if the False part throws an…
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…
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…
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…
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…
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…
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),…
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…
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…
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…
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…
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…
Prime numbers matrix and coloring with Python and xlsxwriter
About 4 years ago, I wrote an article about prime numbers in Excel and their visualisation with VBA – vba-function-in-excel-to-check-prime-numbers. Pretty much, it displays the prime numbers in a 10 x N matrix, starting from 1 and finishing at N:…
Tagged with: align, bg_color, center, Excel, first column and first row of Excel is with index 0, font_color, format, matrix, prime numbers, Python, xlsxwriter
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…
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…
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…
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…
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…
VBA – Insert an image/picture in Excel and position it correctly
Inserting an image to Excel with VBA is actually one line: ThisWorkbook.Worksheets(1).Pictures.Insert ("C:\Users\myPic.png") The interesting part happens, when it should be correctly positioned. In order to position it the way we want, we need to give 3 parameters – the image…
VBA – Put a Collection inside a Scripting Dicitonary OR Make an Updateable ComboBox
The idea of the article is to make an updateable combobox, which takes all the keys of column A and writes them to the ComboBox. Then, upon selection of the corresponding values in the combobox, it provides the corresponding values…
VBA – ListBox in Excel – Adding, Editing and Removing Data
The idea of the article is to show how to add, edit and remove specific entries of the ListBox in Excel through VBA: ListBox is a control, which is available through Developer>Insert>ActiveX>ListBox in Excel: Once you add it, it has…
VBA – Reverse words in a sentence
Reversing words in a sentence with VBA in Excel is quite easy, using the built-in StrReverse function. StrReverse takes a string and reverses it. Thus, “VitoshAcademy.com” becomes “moc.ymedacAhsotiV”: The idea of reversing the order of the words in a sentence…
Top VBA-Excel errors
Some months ago #VBA was finally considered the most dreaded language in the 2019 StackOverflow survey: One of the reasons for this, is probably that #VBA is quite too easy to enter, thus plenty of non-IT professionals feel fascinated about…
VBA – Abstract classes. Classes, that cannot be instantiated.
There are parts of #VBA, that can scare any VBA developer, who has not bumped into other languages. Although, the “abstract class” term is quite popular in C# and other languages, and is quite easy to be created, in VBA,…
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VBA – Make Excel Comments Beautiful
Everyone, who has worked with Excel more than a year knows that the comments are actually quite useful – they allow us to put info data into a cell, without actually putting data in the cell. However, the standard way…