Rob Wise questions

Rob Wise answers

• React native: watchID: ?number = null what is this syntax?
• Composite key in associative tables
• Add column in Oracle table
• Why the need of Immutable states for redux
• How to write a RSpec test to compare a string with its expected substring?
• Rails: route helpers for nested resources
• For new ActiveRecord models, why do some has_many :through associations add a (1=0) predicate and distinct clause to the sql query?
• Access react router state in selector
• continuous page numbering through section breaks [closed]
• Why is an array of all `ids` needed in a normalized state shape?