How to retrieve entire Logger output? - google-apps-script

Question

I have large sets of data (mainly arrays and objects with many elements) and I am trying to log out the entire result to check for bugs. However, in some cases it says "Logging output too large. Truncating output." Where can I see the output in its entirety? I am working with Map Objects and trying to debug why my calculations don't match Google's output.

Answer 1

Logger.log is limited to the number of lines that it can contain. However you can make your own logger and save it to a text file.
var Log = null;
function testLogger() {
try {
Log = new LogFile("testLogFile");
test1();
test2();
throw "done"
}
catch(err) {
Log.log(err);
Log.save();
}
}
function test1() {
Log.log("in test1");
}
function test2() {
Log.log("in test2");
}
class LogFile {
constructor (name) {
if( name === undefined ) name = "_LogFile"
this.name = name;
this.text = [];
}
log(text) {
this.text.push(text);
}
save() {
try {
let text = "";
this.text.forEach( line => text = text.concat(line,"\n") );
let files = DriveApp.getFilesByName(this.name);
let file = null;
if( files.hasNext() ) {
file = files.next();
file.setContent(text);
}
else {
DriveApp.createFile(this.name,text);
}
}
catch(err) {
Logger.log(err);
}
}
}
The text file is shown below.