Issue #15724 has been updated by Earlopain (Earlopain _). Status changed from Open to Closed The irb PR is merged, presumably this is done ---------------------------------------- Feature #15724: Optionally suppress output from IRB for assignment expressions https://bugs.ruby-lang.org/issues/15724#change-118049 * Author: onlynone (Steven Willis) * Status: Closed ---------------------------------------- Most REPLs I've used don't print out the output of assignment expressions like `a = 1`. Being able to suppress this output is very useful when you have a string which is essentially a blob, an object with a large string representation, or even an array of several objects like this. This happens to me often with rails' ActiveRecords where a query might return hundreds of objects that I just want to assign to a variable and don't want to inspect yet. It's even worse with rails because queries are run lazily, just because I did `a = User.where(name='Sally')` doesn't mean I actually wanted to execute that query against the db yet. I might want to do `a = a.where('age > 35')`. But irb doing the echo forces the evaluation. I wrote this patch to irb: https://github.com/ruby/irb/pull/12 which would suppress irb's echo for assignment expressions when a new config setting: `context.echo_on_assignment` is false. It uses the new `RubyVM::AbstractSyntaxTree` to determine whether an expression is an assignment expression, so it only works on ruby >= 2.6.0. I'd very much welcome some feedback and any ideas on how to get it to work for earlier ruby versions. I had also written a first-pass proof-of-concept that used the `parser` gem and would work for ruby >= 2.0.0 (https://github.com/ruby/irb/pull/11). This version obviously can't be merged because of the external dependency, but perhaps it can be treated like readline: use it if it's already installed, but don't depend on it? -- https://bugs.ruby-lang.org/