The goal of this program is to read a line from a file and load it into a buffer of a fixed size buf_len. If the line ends or the buffer is not big enough to store the line the program exits. int read_line(int file, char * buffer, size_t buf_len) { size_t total = 0;… Read More Is there any performance and usage-difference between read and fread?
I’m doing the CS50 course (so please don’t give me the exact right answer, but point me in the right direction! I got my program (below) to work (although I’m not sure if I did it ‘the right way’); it prints the 8 license plates from plates.txt. However, valgrind still tells me I’m losing some… Read More Question about freeing malloc()ed memory in C
In c i am trying to read/write to a file with fread/fwrite(). According to this answer i can use ferror() and feof() to check for errors. My question is, how can i use them to do this? also what use does feof() provide? why would one want to check if a file has hit EOF… Read More how to detect read/write errors when using fread() and fwrite?
I’m trying to iterate over a VCF file and create vectors with the data to build a DataFrame. However, the rust compilator is raising an error saying that the borrowed value does not live enough. I’m cloning the value because, in that case, I’m borrowing the vcf record as immutable and as mutable at the… Read More Dealing with clone in rust
I’m trying to understand data.table’s fread function. I am hoping to read in a csv file, starting at the row where ‘!’ first appears. The number after "!" changes from table to table, but the "!" is a constant feature. Here’s a version of the data I’m using. When I copy and paste this into… Read More R data.table fread bug
If I have an empty csv file with the headers like this – ❯ cat an.csv 10:36:25 a,b,c,d In Rconsole when I fread it I get an empty DT. ❯ b = fread(‘an.csv’) ❯ b Empty data.table (0 rows and 4 cols): a,b,c,d But if I have a numeric header name in one of the… Read More fread reads empty csv wrongly when there is a numeric colname