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Rails :dependent => :destroy VS :dependent => :delete_all
...s with the callback.
The :delete_all is made directly in your application and deletes by SQL :
DELETE * FROM users where compagny_id = XXXX
With the :destroy, there is an instantiation of all of your children. So, if you can't destroy it or if each has their own :dependent, its callbacks can be ...
Disable messages upon loading a package
...y startup messages where as my preferred suppressMessages() suppresses any and all messages (but not cat() as I recall). But one is not supposed to use that in startup text.
– Dirk Eddelbuettel
Dec 31 '11 at 0:36
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node.js child process - difference between spawn & fork
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Spawn is a command designed to run system commands. When you run spawn, you send it a system command that will be run on its own process, but does not execute any further code within your node process. You can add listeners for the proces...
How to hide command output in Bash
...gant for the end user. How do I hide the output when Bash is executing commands?
7 Answers
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Passing route control with optional parameter after root in express?
I'm working on a simple url-shortening app and have the following express routes:
2 Answers
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Child with max-height: 100% overflows parent
I'm trying to understand what appears to be unexpected behaviour to me:
12 Answers
12
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async await return Task
...e wrapped in Task, If you return int it will be wrapped in Task<int> and so on.
If your async method needs to return int you'd mark the return type of the method as Task<int> and you'll return plain int not the Task<int>. Compiler will convert the int to Task<int> for you.
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What is a “symbol” in Julia?
...ent than a string is that strings are mutable while symbols are immutable, and symbols are also "interned" – whatever that means. Strings do happen to be mutable in Ruby and Lisp, but they aren't in Julia, and that difference is actually a red herring. The fact that symbols are interned – i.e....
Git pull after forced update
I just squashed some commits with git rebase and did a git push --force (which is evil, I know).
3 Answers
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How to append something to an array?
...to the length property. The interpreter does an amazing job at that itself and it will not make any difference in The Real World whether you optimize it away or not. If your array becomes so huge that optimizing .length would actually help, most probably an array is not the right data structure anym...