Detect if there is a number at the beginning of an input

Question

I am making an apple ][ (2) emulator, and I am working on the last part, writing the code

What I want to happen is when somebody inputs the following:

20 x = 0

In the file, on line 20, it should put:

x = 0

When looking it up, I cant find anything to help with it, other then checking the whole string for numbers.

The 3 problems are:

writing to the correct file line
not writing the file line number to the file line
removing any blank lines

an example for 3 is:

Well say this is the file were using:

x = 0



while True:
    
    
    
    
    if x = 9:
        
        
        
        
        x = 0
        
    
    
    
    x += 1

if somebody inputs '20', the file then should look like this:

x = 0



while True:
    
    
    
    
    if x = 9:
        
        
        
        
        x = 0

Rather then this:

x = 0



while True:
    
    
    
    
    if x = 9:
        
        
        
        
        x = 0

This question is too vague. Please post actual code, so we don't have to guess what you meant. — John Gordon
– John Gordon, Commented Nov 1, 2023 at 17:38
@JohnGordon I don't have any code yet, I cant find anything on how to do it, and I don't have any ideas on how to do it either. — Tokyn Blast
– Tokyn Blast, Commented Nov 1, 2023 at 17:41
Beware, you are mixing different aspects. Your question could be related to a Basic language interpretor where all lines in a program are preceded by a line number, or to a text editor where someone could insert a line at a given position. They have always been different environments for a reason... If you want to emulate how old systems used to work, refrain to adding too many new functionalities. — Serge Ballesta
– Serge Ballesta, Commented Nov 1, 2023 at 17:41
@SergeBallesta I am not adding new functionallity. In fact, I still need to add more stuff to it. — Tokyn Blast
– Tokyn Blast, Commented Nov 1, 2023 at 17:44
Split the text input on spaces using split(), then grab the first part and check if it is numeric. What is the difficulty? — John Gordon
– John Gordon, Commented Nov 1, 2023 at 17:46

Tokyn Blast · Accepted Answer · 2023-11-01 18:06:19Z

0

You use .split

You take the obj 0, then use that for placements as far as placing on a specific line goes, you have to make the whole file a list, then write to the list object, then rewrite it to the file.

answered Nov 1, 2023 at 18:06

Tokyn Blast

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