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Objective-C ARC: strong vs retain and weak vs assign
... don't point to it anymore"
in other words " I'am the owner, you cannot dealloc this before aim fine with that same as retain"
You use strong only if you need to retain the object.
By default all instance variables and local variables are strong pointers.
We generally use strong for UIViewControlle...
Setting variable to NULL after free
... int *nPtr=NULL;. Now, I would agree that this would be redundant, with a malloc following right in the next line. However, if there is code between the declaration and the first initialization, somebody might start using the variable even though it has no value yet. If you null-initialize, you get ...
Execute stored procedure with an Output parameter?
...r possible ways to execute stored procedure(like EXEC , calling from C# or PHP) but this is the easiest and a non technical person can do this. so +1 for this and thx for sharing the information.
– Dhaval
Sep 3 '13 at 11:13
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INSERT with SELECT
...
Sure, what do you want to use for the gid? a static value, PHP var, ...
A static value of 1234 could be like:
INSERT INTO courses (name, location, gid)
SELECT name, location, 1234
FROM courses
WHERE cid = $cid
...
JavaScript single line 'if' statement - best syntax, this alternative? [closed]
...
You could use this format, which is commonly used in PHP:
(lemon) ? document.write("foo gave me a bar") : document.write("if condition is FALSE");
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Why not use Double or Float to represent currency?
...y don't call for a lot of math, the operations consist of adding things or allocating amounts to different buckets. Introducing floating point and rounding just complicates things.
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Manual deployment vs. Amazon Elastic Beanstalk
...osed to be free but AWS doesn't make it obvious that each environment will allocated a load balancer that will cost you around $15 a month. I wasn't comparing with a micro instance.
– Ken Liu
Aug 21 '13 at 15:25
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How to send email from Terminal?
... for help.
You will need to set SMTP up:
http://hints.macworld.com/article.php?story=20081217161612647
See also:
http://www.mactricksandtips.com/2008/09/send-mail-over-your-network.html
Eg:
mail -s "hello" "example@example.com" <<EOF
hello
world
EOF
This will send an email to example@example....
SQL command to display history of queries
... at the query cache: http://www.databasejournal.com/features/mysql/article.php/3110171/MySQLs-Query-Cache.htm but it might not give you access to the actual queries and will be very hit-and-miss if it did work (subtle pun intended)
But MySQL Query Browser very likely maintains its own list of queri...
MySQL - force not to use cache for testing speed of query
...ache in action! Worth the read. databasejournal.com/features/mysql/article.php/3110171/…
– Adrian P.
Feb 20 '14 at 18:03
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