JuliaLang/julia

Support `'` format flag for `@printf`

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#29,077 opened on Sep 7, 2018

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 (2 comments) (8 reactions) (0 assignees)Julia (5,773 forks)batch import
display and printinghelp wanted

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Description

See https://stackoverflow.com/questions/52213829/in-julia-insert-commas-into-integers-for-printing-like-python-3-6.

Would it be difficult to support the ' format flag that adds thousand separators? Currently, using it explicitly throws an error that it is not yet supported.

Contributor guide

Research direction
Examine the implementation of @printf in Julia's base/printf.jl and add support for the ' flag to add thousand separators by modifying the format specifier handling.
Tech stack
None
Domain
backend
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Julia
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
70