On 07/09/2018 4:17 AM, Arun Chandrasekaran wrote:
On Thursday, 6 September 2018 at 16:13:42 UTC, hridyansh thakur wrote:
how to read a file line by line in D
std.stdio.File.byLine()
Refer the doc here: https://dlang.org/library/std/stdio/file.by_line.html
An example from the doc:
```
import std.algorithm, std.stdio, std.string;
// Count words in a file using ranges.
void main()
{
auto file = File("file.txt"); // Open for reading
const wordCount = file.byLine() // Read lines
.map!split // Split into words
.map!(a => a.length) // Count words per line
.sum(); // Total word count
writeln(wordCount);
}
```
Ranges will be far too advanced of a topic to bring up at this stage.
So something a little more conventional might be a better option:
---
import std.file : readText;
import std.array : split;
import std.string : strip;
string text = readText("file.txt");
string[] onlyWords = text.split(" ");
uint countWords;
foreach(ref word; onlyWords) {
word = word.strip();
if (word.length > 0)
countWords++;
}
---
