Data commit

Task/File-input-output/Zkl/file-input-output-1.zkl

@@ -0,0 +1,3 @@
+var d=File("input.txt").read();
+(f:=File("output.txt","w")).write(d); f.close(); // one read, one write copy
+File("output.txt").pump(Console); // verify by printing

Task/File-input-output/Zkl/file-input-output-2.zkl

@@ -0,0 +1,3 @@
+var in=File("input.txt"), out=File("output.txt","w");
+foreach line in (in) { out.write(line) } // copy line by line
+out.close(); // or out=Void and let GC close the file

Task/File-input-output/Zkl/file-input-output-3.zkl

@@ -0,0 +1,2 @@
+fin,fout:=File("input.txt","rb"), File("output.txt","wb"); // copy in chunks, implicit buffer
+fin.pump(Data(0d524_287),fout); fin.close(); fout.close();

Task/File-input-output/Zkl/file-input-output-4.zkl

@@ -0,0 +1,2 @@
+// copy in chunks, let GC close file handles
+File("input.txt","rb").pump(Data(0d524_287),File("output.txt","wb"));

Task/File-input-output/Zkl/file-input-output-5.zkl

@@ -0,0 +1 @@
+File("input.txt").pump(Data(),File("output.txt","w"),"text","toUpper");