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Difference between '..' (double-dot) and '…' (triple-dot) in range generation?
I've just started learning Ruby and Ruby on Rails and came across validation code that uses ranges:
5 Answers
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How do I ignore ampersands in a SQL script running from SQL Plus?
...ave a SQL script that creates a package with a comment containing an ampersand (&). When I run the script from SQL Plus, I am prompted to enter a substitute value for the string starting with &. How do I disable this feature so that SQL Plus ignores the ampersand?
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Android: how do I check if activity is running?
...the same class running? What if you extend MyActivity with MyChildactivity and want to check if the child is active?
– Mister Smith
Sep 2 '13 at 10:27
2
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Maximum length of the textual representation of an IPv6 address?
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Note, this is an input/display convention - it's still a 128 bit address and for storage it would probably be best to standardise on the raw colon separated format, i.e. [0000:0000:0000:0000:0000:ffff:c0a8:64e4] for the address above.
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How to sort a HashSet?
...ements sorted for this one occurrence, then just temporarily create a List and sort that:
Set<?> yourHashSet = new HashSet<>();
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List<?> sortedList = new ArrayList<>(yourHashSet);
Collections.sort(sortedList);
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Java: Literal percent sign in printf statement
I'm trying to add an actual percent sign into a printf statement in Java and I'm getting the error:
3 Answers
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How to prevent caching of my Javascript file? [duplicate]
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Add a random query string to the src
You could either do this manually by incrementing the querystring each time you make a change:
<script src="test.js?version=1"></script>
Or if you are using a server side language...
Can Rails Routing Helpers (i.e. mymodel_path(model)) be Used in Models?
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In Rails 3, 4, and 5 you can use:
Rails.application.routes.url_helpers
e.g.
Rails.application.routes.url_helpers.posts_path
Rails.application.routes.url_helpers.posts_url(:host => "example.com")
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Android gradle: buildtoolsVersion vs compileSdkVersion
...ween buildtoolsVersion vs compileSdkVersion in the build.gradle for an Android project?
2 Answers
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Splitting a list into N parts of approximately equal length
...a list into roughly equal parts? For example, if the list has 7 elements and is split it into 2 parts, we want to get 3 elements in one part, and the other should have 4 elements.
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