Martin AJ questions

• How can I make an element center horizontally? [duplicate]
• How can I get the value of the last th?
• How to handle array_shift() on Null?
• How can I wait until both ajax requests done?
• How can I add new changes to the last not-pushed commit?
• How can I get a part of the value of class attribute?
• How can I access a property out of the static method?
• Is adding multiple indexes on one table harmful for inserting?
• How to know working directory refers to which branch in git?
• How can I select the last edited version of the post?

Martin AJ answers