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Change Circle color of radio button
...any I got it working for > 21 already.. I am looking for answers specifically for < 21
– Lenin Raj Rajasekaran
Nov 20 '15 at 8:40
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What is Normalisation (or Normalization)?
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Normalization is basically to design a database schema such that duplicate and redundant data is avoided. If some piece of data is duplicated several places in the database, there is the risk that it is updated in one place but not the other, lea...
SQL JOIN and different types of JOINs
...Combines common records from two tables based on equality condition.
Technically, Join made by using equality-operator (=) to compare values of Primary Key of one table and Foreign Key values of another table, hence result set includes common(matched) records from both tables. For implementation see...
“wait_fences: failed to receive reply: 10004003”?
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Override -viewDidAppear:, not -viewWillAppear, and make sure to call [super viewDidAppear:]. You should not perform animations when you are not on screen ("will appear"). And the -viewDidAppear: docs explain that you must call super because they have their own things to do.
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Are Java static initializers thread safe?
...efore, can I guarantee that this static code block will only absolutely be called once when the class is first loaded? I understand I cannot guarantee when this code block will be called, I'm guessing its when the Classloader first loads it. I realize I could synchronize on the class in the static c...
How to Animate Addition or Removal of Android ListView Rows
...andler. Second, it makes the code less complex by already using a built-in callback for when the animation finishes. Third, you don't know how the implementation of Handler and Animation will work on each platform; it may be possible that your delayed runnable happens before the animation finishes.
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How to truncate a foreign key constrained table?
...data integrity (see stackoverflow.com/questions/5452760/…). So, what you call "light" in the real world is considered to be a bad practice. PS: thanks for the downvote
– zerkms
Nov 1 '12 at 2:59
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How to atomically delete keys matching a pattern using Redis
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Starting with redis 2.6.0, you can run lua scripts, which execute atomically. I have never written one, but I think it would look something like this
EVAL "return redis.call('del', unpack(redis.call('keys', ARGV[1])))" 0 prefix:[YOUR_PREFIX e.g delete_me_*]
Warning: As the Redis document s...
How to generate a Dockerfile from an image?
...get to a buildable Dockerfile. That other tool may do this editing automatically for you (I did not try it, so I don't know.)
– user7610
Jan 26 '18 at 9:28
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Adaptive segue in storyboard Xcode 6. Is push deprecated?
...me. I am using Xcode 6 beta 2 and to test I used the single view template (calling the pre made view controller in IB ‘VC_A’). I then added another view controller (‘VC_B’). I then added a button on VC_A to show VC_B and another from VC_B back to VC_A. When I add a navigation controller as t...