How to read a line from stdin, blocking until the newline is found?
Try this patch char *line = NULL; +size_t size; +if (getline(&line, &size, stdin) == -1) { -if (getline(&line, 0, stdin) == -1) { printf(“No line\n”); } else {
io
cout or printf which of the two has a faster execution speed C++?
Each has its own overheads. Depending on what you print, either may be faster. Here are two points that come to mind – printf() has to parse the “format” string and act upon it, which adds a cost. cout has a more complex inheritance hierarchy and passes around objects. In practice, the difference shouldn’t matter … Read more
java.io.File vs java.nio.Files which is the preferred in new code?
The documentation that you linked give the answer: The java.nio.file package defines interfaces and classes for the Java virtual machine to access files, file attributes, and file systems. This API may be used to overcome many of the limitations of the java.io.File class. The toPath method may be used to obtain a Path that uses … Read more
Convert InputStream into Stream given a Charset
I think you can try: Stream<String> lines = new BufferedReader(new InputStreamReader(is, cs)).lines();
Read and Write Text in ANSI format
To read a text file with a specific encoding you can use a FileInputStream in conjunction with a InputStreamReader. The right Java encoding for Windows ANSI is Cp1252. reader = new BufferedReader(new InputStreamReader(new FileInputStream(csvFile), “Cp1252”)); To write a text file with a specific character encoding you can use a FileOutputStream together with a OutputStreamWriter. writer … Read more
parsing a tab-separated file in Python
You can use the csv module to parse tab seperated value files easily. import csv with open(“tab-separated-values”) as tsv: for line in csv.reader(tsv, dialect=”excel-tab”): #You can also use delimiter=”\t” rather than giving a dialect. … Where line is a list of the values on the current row for each iteration. Edit: As suggested below, if … Read more
A Haskell function of type: IO String-> String
You can easily enough write a function that calls the readFile action, and passes the result to your index function. readAndIndex fileName = do text <- readFile fileName return $ index text However, the IO monad taints everything that uses it, so this function has the type: readAndIndex :: FilePath -> IO [(String, [Integer])]
Difference between io.open vs open in python
Situation in Python3 according to the docs: io.open(file, *[options]*) This is an alias for the builtin open() function. and While the builtin open() and the associated io module are the recommended approach for working with encoded text files, this module [i.e. codecs] provides additional utility functions and classes that allow the use of a wider … Read more
Writing to console with System.out and PrintWriter
A quick Google revealed a thread on Coderanch which was useful. There are several other ways of doing console writing but there seems to be no real benefit of using one or the other apart from less code to write and that the creation of a new PrintWriter object will take up more memory (eventually). … Read more
Reading a file character by character in C
There are a number of things wrong with your code: char *readFile(char *fileName) { FILE *file; char *code = malloc(1000 * sizeof(char)); file = fopen(fileName, “r”); do { *code++ = (char)fgetc(file); } while(*code != EOF); return code; } What if the file is greater than 1,000 bytes? You are increasing code each time you read … Read more