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How do I parse a text file for coord pairs?

Vaughn

I want to read a file and return a list of all the coord pairs in the file. Due to the unknown seperator between coord. I want to return any two number pairs per line.

I can use the while command to parse strings but am unable to find how to parse for numbers while reading a file.

 

Parents

  • The square brackets are used to specify a possible set of matches. This particular line finds any one of the following:

    rexCompile( "[xyXY] *[=:]")

    x=
    X =
    x:
    y:
    Y   =

    The following rexReplace will remove the X= or X: or Y= or Y: and replace it with a space. What the code is doing is trying to remove any characters that might be next to a number without a space. It is very common for x=1 to appear or y:3 to appear. The regular expression is replaced with a space so we can run the parseString in a later step.

    rexCompile( "[(){}=,:]")
    This will find and replace the equal sign, parentheses, commas, braces and colons. Again the goal is to isolate the number.

     rexCompile( "\\. ")
    The removes a period followed by a space to differentiate a float from an integer.

    Derek

     

     

Reply

  • The square brackets are used to specify a possible set of matches. This particular line finds any one of the following:

    rexCompile( "[xyXY] *[=:]")

    x=
    X =
    x:
    y:
    Y   =

    The following rexReplace will remove the X= or X: or Y= or Y: and replace it with a space. What the code is doing is trying to remove any characters that might be next to a number without a space. It is very common for x=1 to appear or y:3 to appear. The regular expression is replaced with a space so we can run the parseString in a later step.

    rexCompile( "[(){}=,:]")
    This will find and replace the equal sign, parentheses, commas, braces and colons. Again the goal is to isolate the number.

     rexCompile( "\\. ")
    The removes a period followed by a space to differentiate a float from an integer.

    Derek

     

     

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