This document discusses Yarn and its advantages over npm. It notes that Yarn uses yarn.lock files instead of npm-shrinkwrap.json files to lock down dependency versions. Yarn is also described as being faster, able to work offline by caching dependencies, and potentially more secure than npm with features like flat mode and module folders. The document suggests Yarn may handle dependencies and devDependencies differently than npm, and questions whether the yarn.lock file should be committed to source control.
This document discusses Yarn and its advantages over npm. It notes that Yarn uses yarn.lock files instead of npm-shrinkwrap.json files to lock down dependency versions. Yarn is also described as being faster, able to work offline by caching dependencies, and potentially more secure than npm with features like flat mode and module folders. The document suggests Yarn may handle dependencies and devDependencies differently than npm, and questions whether the yarn.lock file should be committed to source control.
29回勉強会資料「PostgreSQLのリカバリ超入門」
See also http://www.interdb.jp/pgsql (Coming soon!)
初心者向け。PostgreSQLのWAL、CHECKPOINT、 オンラインバックアップの仕組み解説。
これを見たら、次は→ http://www.slideshare.net/satock/29shikumi-backup
64. DB には UTC で保存
根拠:
• プログラムでの UTC の扱いやすさ (前述)
• DB の値が Invalid/Ambiguous Time でないことが
保証される (UTC => Local 変換は失敗しな
い)
• DateTimeOffset だと、結局夏時間対応のた
め別フィールドでタイムゾーン情報を持つ
必要がある
65. DB には UTC で保存
しんどいところ:
• DB を検索する時も DB に保存する時も Local
=> UTC 変換が必要。となると
Invalid/Ambiguous Time 対応が必要になる
※DateTimeOffset でも必要なのは同じ