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lionfaggot

what is even the point of using FileOpen() in autoit?

14 posts in this topic

seriously why does everyone who is like oh snap i need to make a fancy UDF use FileOpen with like FileWrite for instance. in some languages stuff like that IS required but nah, autoit does this automatically with read and write functions. so seriously why does anyone with a brain in their head want to type silly extra crap for no reason?

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It's explained in the help file why you'd want to use a file handle rather than a file name.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
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still would rather use the name, have never had any issues. im lazy man i dont want to type two lines for a job one line can do

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It depends on what you're doing with the file, the size of the file, and whether you care if parsing the file takes forever or not.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

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if parsing the file takes forever thats usually because im storing like a metric ton of shit. in which case id hop over to an associative array or somesuch. also, speaking of, has anyone made a udf for binary trees in autoit yet? those come in handy for things at times. maybe ill write one if it doesnt exist. comments, concerns?

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I'm talking about adding text to the end of a very large file using FIlewrite/FileWriteLine, if you use the file name AutoIt has to parse the entire file before it gets to the end of it. With FileOpen using the $FO_APPEND option, it just sticks on the end and it's done. Using FileReadLine with a file name and looping through the file takes a very long time, and you have to use the line number, where using it with a handle doesn't take nearly as long, and you don't need to keep track of the line number or how many lines the file has.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

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#7 ·  Posted (edited)

reading and writing to a large file period will take a long time regardless. large data storage isnt a task for files at all. at least not until you go to save the data for later use. even arrays for that matter suck at this task. there are more elegant ways to store large amounts of data, writing files is not one of them haha

Edited by lionfaggot

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also fair point about ti starting at the end of the file, that does save at least a bit of coding in some scenarios

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i guess ive just never run into a scenario where i needed to use fileopen yet. i can see the use in it now. still, never had any issues. for large lists i always used theassocarray udf. fair point as well John

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If there wasn't any point to FileOpen, then I dare the say the authors/Devs wouldn't have included it as part of the language. I rarely using FileRead with a filepath and mostly opt for using a "handle" instead.

Interesting question though.


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Updated: 04/09/2015

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#12 ·  Posted (edited)

If I was able to vote best answer it would be >#9 - JohnOne's responce. Reading, or writing to, a file using the wrong encoding is going to cause problems.

Edited by czardas

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I have long restrained itself to not respond to stupidity.

If you do not need the feature you are able to not use it

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FileWrite/Line with a filename are for simple operations like your brain does the same.


 

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