hadrienblanc

begin
  file = File.open("/tmp/some_file", "w")
  file.write("your text") 
rescue IOError => e
  #some error occur, dir not writable etc.
ensure
  file.close unless file.nil?
end

hadrienblanc

On a debian OS system

RUN apt-get update
RUN apt-get install libjemalloc-dev
ENV LD_PRELOAD="/usr/lib/x86_64-linux-gnu/libjemalloc.so" 

hadrienblanc

ORDER BY NULL

Explicitly ORDER BY After GROUP BY By default, the database sorts all 'GROUP BY col1, col2, ...' queries as if you specified 'ORDER BY col1, col2, ...' in the query as well. If a query includes a GROUP BY clause but you want to avoid the overhead of sorting the result, you can suppress sorting by specifying 'ORDER BY NULL'.

hadrienblanc

# How to use sqlite3


```
sqlite3 db/development.sqlite3
```


```
sqlite3 db/development.sqlite3

hadrienblanc

my_string.chars do |c|
  puts "%s %3d %02X" % [ c, c.ord, c.ord ]
end

hadrienblanc

docker stop $(docker ps -a -q) #stop all docker container

hadrienblanc

class User < ActiveRecord::Base
 def do_something!
   self.my_attr = 123
 end

 def do_another_thing!
   my_attr = 456
end

hadrienblanc

🇺🇸

:en:

hadrienblanc

# classique circle_ci rails test config file
version: 2
jobs:
  build:
    environment:
    working_directory: ~/circleci-myapp
    docker:
      - image: circleci/ruby:2.5.5-node-browsers
    steps:
      - checkout

hadrienblanc

Are you doing a array of hashes ? They merge. :/

Unless you as: :json on the test post

    post api_v1_stuff, params: params, as: :json