How to increment sequential Const values when adding a new one in the middle

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I have a code like this

value1 = 1;
value2 = 2;
value4 = 3;
valuen = n;

and say I want to add value3 = 3; to the list without having to deal with the pain of editing all the values to n.

Is there a intrinsic method or a trick that can be done to make this easier in the future?

How to use the Excel SEQUENCE function, The Excel SEQUENCE function generates a list of sequential numbers in an value (defaults to 1). step - [optional] Increment between each value (defaults to 1 ). SEQUENCE is a new function available in Excel 365 only. You can reverse a text string with the TEXTJOIN and MID functions, by using an array constant. 1. Create a worksheet with contents as below screenshot shown: A. In cell A2, type the text string before the numbers. B: Column B is the increment number column, in cell B2, type the first increment number, and then fill the below cells with the increment number you need.

No, there is no way to update the values of the consts if they are defined that way and if a new value is inserted somewhere in the middle. But see below: there are ways to achieve this.


But you could use an enumeration instead:

  ValueType = (
    value1 = 1,   // 1
    value2,       // 2
    value4,       // 3
    valuen);      // n 

You can easily add a value3, and all subsequent values shift accordingly:

  ValueType = (
    value1 = 1,   // 1
    value2,       // 2
    value3,       // 3
    value4,       // now: 4
    valuen);      // now: n+1 

This also makes them typesafe. Of course, if you really want to use them as integers, you will have to cast: Integer(value3) (to read or write) or use Ord(value3) (to read). But you would typically use them directly as enumerations. You can also easily create sets out of these, which is much harder with constants.


Of course, if you really want to use constants, you can do what others do in such circumstances:

  value1 = 1;              // 1
  value2 = value1 + 1;     // 2
  value4 = value2 + 1;     // 3
  value5 = value4 + 1;     // 4
  // etc...

Now, if you want to add a value3, you'll only have to update a few values:

  value1 = 1;          // 1
  value2 = value1 + 1; // 2 
  value3 = value2 + 1; // new: 3
  value4 = value3 + 1; // modified: 4 
  value5 = value4 + 1; // now: 5
  // etc...

This is of course less typesafe and requires more work.

Parameters that require bitwise operations

For an API that always expects an integral type or even or-ed/and-ed combinations of such integers, and which I can't modify, I would use integral constants again:

  Flags = Cardinal;
  Flag1 = 1;           // 1
  Flag2 = Flag1 shl 1; // 2
  Flag3 = Flag2 shl 1; // 4
  Flag4 = Flag3 shl 1; // 8
  // etc.

Used like:

MyAPIFunc('Hello, world', Flag1 or Flag3 or Flag4);

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You can use the Succ() function. Of course, using enumerations are easier to understand, but this is the direct answer to your question.


  value1 = 1;
  value2 = succ(value1);
  value4 = succ(succ(value2));
  value5 = succ(value4);
  value6 = succ(value5);

To insert Value3, you have only to change value4 and leave value5 and value6 unchanged.:

  value1 = 1;
  value2 = succ(value1);
  value3 = succ(value2);
  value4 = succ(value3);
  value5 = succ(value4);

7. Iteration — How to Think Like a Computer Scientist: Learning with , A new assignment makes an existing variable refer to a new value (and stop Line 2 means get the current value of n, multiply it by three and add one, and It is called an increment of the variable; subtracting 1 is called a decrement. def seq3np1(n): """ Print the 3n+1 sequence from n, terminating when it reaches 1. Learn about how to create a formula to create a product code where the middle part of the code must increment as it is copied down a column. See the Functions ROWS and TEXT.

Customize Magento 2 Order Increment ID, Learn how to customize Magento 2 Increment ID for orders, invoices, credit the increment ID is in Magento\SalesSequence\Model\Sequence . The getCurrentValue() method returns a new increment ID according to 000000301 ) effectively have a 1 added to a multiple of the step value (which is 100). i want to increment sequence number by 1 in sql server. i have 3 question data(Q1,Q2,Q3) and these have sequence number 1,2,3, and when i add a new Q4 question data and i want to add sequence number 2 then already have a sequence number increment by one then new sequence 3,4 for question (Q2,Q3).

C Basics - C Programming Tutorial, An identifier is a sequence of characters, of up to a certain length Constants are non-modifiable variables, declared with keyword const . In brief, It is important to take note that char '1' is different from int 1 , short 1 , float 1.0 , double 1.0 C supports these unary arithmetic operators: increment '++' and decrement ' --' . The key then is knowing what upgrades increase home value when the time to sell inevitably comes, as your ROI “really depends on the type of house you’re selling and whom you’re selling to,” said Alexandra Isham, program manager, design, with the National Association of Home Builders (NAHB) in Washington, D.C.

IDENTITY Columns, Note: Identity columns in Vector only work for INSERT…VALUE. An identity column is a way to automatically generate a unique numeric value for each row in a table. Specifies the start of the sequence as an integer constant. The default value is 1 for positive sequences (positive increment) and -1 for negative sequences� Note: The post-increment here begins with the value 0 and changes it to the value 1. Also: You use any constant or other expression resulting in a numeric value in the increment statement. Pre-increment: Pre-increment has 2 pluses before the identifier. The store opcode is executed before the load operation.

  • No. There's no IDE magic that will renumber constants for you. You'll need to edit them yourself, or use a different data type (like a constant array, for instance).
  • Write a program to do this. This is exactly why you learn a language like Python so you can do this in a couple of minutes.
  • Use an enum if you don't mind typecasting. type TValues = (value1 = 1, value2, value3, ...);
  • It's slightly embarassing, but I'd use Excel for this: Replace all ` = ` with tabstops and copy it over to an empty Excel sheet. Then use the column autofill feature and so on...
  • A dirty trick: Select all lines of constants you want to increment. Make a Search & Replace for ";" to "+1;" with scope current selection.
  • Where were you yesterday?, I'm about to cry because of this answer
  • So I be happy, I reverted the file to an old version and tried this, It is wonderful and it really takes seconds. thank you
  • Please add that the shortcut is ctrl + O + C
  • Idiom is to use Ord() to obtain ordinal value of an enum value
  • For now I'm painfully editing the consts by myself, but I think the first option would be more appropriate for the future (I wonder how the Guys at emba are editing control messages when they want to add new ones).
  • @Nasreddine: David is right. If they add a new one, they don't want the others to change their values.
  • There's really no scenario where you need to integer cast. Use Ord to go from enum to ordinal. Cast to the enumerated type to go in the other direction. I'm not sure why you are so attached to that cast.
  • @David: I am not really attached to the cast, but if you want an integer, it is not uncommon to cast to one.
  • This is in essence a subset of Rudy's answer.
  • I tried using this, but I have one problem with it takes readability away (what if the difference between v2 an v4 is 5? ), Thank you for your help