eof - w3toppers.com

read.csv warning ‘EOF within quoted string’ prevents complete reading of file

You need to disable quoting. cit <- read.csv(“citations.CSV”, quote = “”, row.names = NULL, stringsAsFactors = FALSE) str(cit) ## ‘data.frame’: 112543 obs. of 13 variables: ## $ row.names : chr “10.2307/675394” “10.2307/30007362” “10.2307/4254931” “10.2307/20537934” … ## $ id : chr “10.2307/675394\t” “10.2307/30007362\t” “10.2307/4254931\t” “10.2307/20537934\t” … ## $ doi : chr “Archaeological Inference and Inductive Confirmation\t” … Read more

EOF in Windows command prompt doesn’t terminate input stream

This is true in almost every terminal driver. You’ll get the same behavior using Linux. Your program isn’t actually executing the loop until \n or ^z has been entered by you at the end of a line. The terminal driver is buffering the input and it hasn’t been sent to your process until that occurs. … Read more

Why do I need to type Ctrl-D twice to mark end-of-file?

On Unix-like systems (at least by default), an end-of-file condition is triggered by typing Ctrl-D at the beginning of a line or by typing Ctrl-D twice if you’re not at the beginning of a line. In the latter case, the last line you read will not have a ‘\n’ at the end of it; you … Read more

SyntaxError: unexpected EOF while parsing

The SyntaxError: unexpected EOF while parsing means that the end of your source code was reached before all code blocks were completed. A code block starts with a statement like for i in range(100): and requires at least one line afterwards that contains code that should be in it. It seems like you were executing … Read more

Can we write an EOF character ourselves?

There is no EOF character. EOF by definition “is unequal to any valid character code”. Often it is -1. It is not written into the file at any point. There is a historical EOF character value (CTRL+Z) in DOS, but it is obsolete these days. To answer the follow-up question of Apoorv: The OS never … Read more

Checking for an empty file in C++

Perhaps something akin to: bool is_empty(std::ifstream& pFile) { return pFile.peek() == std::ifstream::traits_type::eof(); } Short and sweet. With concerns to your error, the other answers use C-style file access, where you get a FILE* with specific functions. Contrarily, you and I are working with C++ streams, and as such cannot use those functions. The above code … Read more

How to use EOF to run through a text file in C?

How you detect EOF depends on what you’re using to read the stream: function result on EOF or error ——– ———————- fgets() NULL fscanf() number of succesful conversions less than expected fgetc() EOF fread() number of elements read less than expected Check the result of the input call for the appropriate condition above, then call … Read more

How to find out whether a file is at its `eof`?

fp.read() reads up to the end of the file, so after it’s successfully finished you know the file is at EOF; there’s no need to check. If it cannot reach EOF it will raise an exception. When reading a file in chunks rather than with read(), you know you’ve hit EOF when read returns less … Read more

Why is “while( !feof(file) )” always wrong?

TL;DR while(!feof) is wrong because it tests for something that is irrelevant and fails to test for something that you need to know. The result is that you are erroneously executing code that assumes that it is accessing data that was read successfully, when in fact this never happened. I’d like to provide an abstract, … Read more

`getchar()` gives the same output as the input string

In the simple setup you are likely using, getchar works with buffered input, so you have to press enter before getchar gets anything to read. Strings are not terminated by EOF; in fact, EOF is not really a character, but a magic value that indicates the end of the file. But EOF is not part … Read more