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Java using enum with switch statement
...ting from the integer to the type-safe enum. Java will not do it automatically. There's a couple of ways you can go about this:
Use a list of static final ints rather than a type-safe enum and switch on the int value you receive (this is the pre-Java 5 approach)
Switch on either a specified id v...
Defining Z order of views of RelativeLayout in Android
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the solution to this bug for me was to call setElevation(1000) on the view which I want to be rendered over the button.
– fire in the hole
May 22 '17 at 16:23
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Android studio Gradle build speed up
...use gradle from the command line and you should switch to binary libs for all modules you do not develop. On g+ there is a discussion with the developers about it.
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How to get the unique ID of an object which overrides hashCode()?
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Uniqueness isn't guaranteed at all ... for a practical JVM implementation. Guaranteed uniqueness requires either no relocation / compaction by the GC, or a big and expensive data structure for managing the hashcode values of live objects.
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ExecJS and could not find a JavaScript runtime
... cannot find a JavaScript runtime. Fair enough when I didn't have any installed, but I've tried installing Node.js , Mustang and the Ruby Racer , but nothing is working.
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How to initialize List object in Java?
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If you check that link, you'll find some classes that implement List:
All Known Implementing Classes:
AbstractList, AbstractSequentialList, ArrayList, AttributeList, CopyOnWriteArrayList, LinkedList, RoleList, RoleUnresolvedList, Stack, Vector
Those can be instantiated. Use their links t...
How can I detect if a selector returns null?
...Why did you wrap 'this' inside a $() ? wouldn't 'this' in this context actually point to jQuery object ?
– Adham Atta
Mar 28 '11 at 11:25
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Key existence check in HashMap
...than getting the value. So it won't optimize anything to check the key actually exists before getting the value. I know it's a generalization but it can help to understand.
– Colin Hebert
Sep 2 '10 at 12:42
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Extracting specific columns from a data frame
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Using the dplyr package, if your data.frame is called df1:
library(dplyr)
df1 %>%
select(A, B, E)
This can also be written without the %>% pipe as:
select(df1, A, B, E)
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How to add a downloaded .box file to Vagrant?
...hing in the Vagrantfile. I am just using the Vagrantfile that got automatically created upon vagrant init. When i cat Vagrantfile, I don't see anything called a password or pem or anything
– Rakib
Sep 15 '15 at 12:31
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