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When to add what indexes in a table in Rails
...s this different from adding the index for each key?
Then the index is a combined index of the two columns. That doesn't make any sense, unless you want all entries for one category_id AND one state_id (It should be category_id not category) at the same time.
An Index like this would speed the f...
MySQL foreign key constraints, cascade delete
...ade any farther and will not take out the 'boots' and 'coats' categories.
comment followup:
you're still misunderstanding how cascaded deletes work. They only affect the tables in which the "on delete cascade" is defined. In this case, the cascade is set in the "categories_products" table. If you ...
Rollback to last git commit
...
Caveat Emptor - Destructive commands ahead.
Mitigation - git reflog can save you if you need it.
1) UNDO local file changes and KEEP your last commit
git reset --hard
2) UNDO local file changes and REMOVE your last commit
git reset --hard HEAD^
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Chmod recursively
... difference between '\;' and '+' that was used by the OP at the end of the command?
– kon psych
Oct 23 '14 at 0:14
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runOnUiThread in fragment
...will happen when the fragment has been detached from the activity. This is common in async tasks, because the activity could have been destroyed during the long running operation, so it no longer exists to get. Always check for null first.
– bclymer
Apr 27 '16 ...
SVN how to resolve new tree conflicts when file is added on two branches
...e.
This should be a tree conflict on the file of the 'local obstruction, incoming add upon merge' variety. Fixed expectations in r35341.
(This is also called "evil twins" in ClearCase by the way):
a file is created twice (here "added" twice) in two different branches, creating two different histori...
How to specify the private SSH-key to use when executing shell command on Git?
...ut I want to specify a private SSH-key to use when executing a shell (git) command from the local computer.
29 Answers
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Unable to hide welcome screen in Emacs
I want to hide the welcome screen.
6 Answers
6
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How does one escape backslashes and forward slashes in VIM find/search?
...e with strings containing backward or forward slashes, how would this be accomplished in vim? Thank you!
6 Answers
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