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How to randomly pick an element from an array
...me you run the function: the random generator is supposed to have history. If it haven't, it's extremely predictable. It's not a problem at all in this case — but it should be mentioned that array[(int)(System.currentTimeMillis() % array.length)] is just as good as the proposed solution.
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How do I execute a bash script in Terminal?
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If you already are in the /path/to directory, e.g. with the cd /path/to command, you can enter ./script to run your script.Don't forget, in this case the './' before 'script'
– FrViPofm
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Scale Image to fill ImageView width and keep aspect ratio
...up/down-scale as needed keeping aspect ratio.
scaleType="centerInside"
if the intrinsic width of src is smaller than parent widthwill center the image horizontally
if the intrinsic width of src is larger than parent widthwill make it as wide as the parent allows and down-scale keeping aspect ra...
Logging levels - Logback - rule-of-thumb to assign log levels
...he fix probably requires human intervention. The "2AM rule" applies here- if you're on call, do you want to be woken up at 2AM if this condition happens? If yes, then log it as "error".
warn: an unexpected technical or business event happened, customers may be affected, but probably no immediate h...
Lost my schema.rb! Can it be regenerated?
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If you run a rake -T it will list all possible rake tasks for your Rails project. One of them is db:schema:dump which will recreate the schema.rb for the Rails app from the database.
bundle exec rake db:schema:dump
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How to compare two NSDates: Which is more recent?
...2;
Then the following comparison will tell which is earlier/later/same:
if ([date1 compare:date2] == NSOrderedDescending) {
NSLog(@"date1 is later than date2");
} else if ([date1 compare:date2] == NSOrderedAscending) {
NSLog(@"date1 is earlier than date2");
} else {
NSLog(@"dates are ...
When to use Comparable and Comparator
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I would say that an object should implement Comparable if that is the clear natural way to sort the class, and anyone would need to sort the class would generally want to do it that way.
If, however, the sorting was an unusual use of the class, or the sorting only makes sense fo...
How does MongoDB sort records when no sort order is specified?
When we run a Mongo find() query without any sort order specified, what does the database internally use to sort the results?
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Bad value X-UA-Compatible for attribute http-equiv on element meta
... involves appearing on a publicly editable wiki page referenced by the specification) or the Validator isn't up to date with the current status of that wiki.
At the time of writing (20130326) X-UA-Compatible appears on the wiki page under a section that states: "The following proposed extensions do...
What is sys.maxint in Python 3?
...As pointed out by others, Python 3's int does not have a maximum size, but if you just need something that's guaranteed to be higher than any other int value, then you can use the float value for Infinity, which you can get with float("inf").
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