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calling non-static method in static method in Java [duplicate]
...hod is to have an instance of the class containing the non-static method. By definition, a non-static method is one that is called ON an instance of some class, whereas a static method belongs to the class itself.
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Check if the number is integer
...tests if the number is declared as an integer. You can declare an integer by putting a L after it.
> is.integer(66L)
[1] TRUE
> is.integer(66)
[1] FALSE
Also functions like round will return a declared integer, which is what you are doing with x==round(x). The problem with this approach i...
Google Guava isNullOrEmpty for collections
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My answer is the same: try to remove the ambiguity by normalizing null to an empty collection as soon as you can. If you just can't, then okay, you might be one of the <1% of users who really want to write their own trivial isNullOrEmpty(Collection) helper.
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Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
... of why: now we have the chance to get faster Python, but we're tripped up by years of relying on C. It'd be much better for Python to stand on its own two feet. It's even okay if Python itself is written in C, but the problem is the existence of an extension mechanism that encourages people to ex...
How to trigger event in JavaScript?
...t, so assign any data you want to access at the other end to it and access by event.detail. +1
– daka
Feb 29 at 14:26
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How to add parameters to a HTTP GET request in Android?
...hat I am attempting to send. I tried adding the parameters to this request by first creating a BasicHttpParams object and adding the parameters to that object, then calling setParams( basicHttpParms ) on my HttpGet object. This method fails. But if I manually add my parameters to my URL (i.e. ...
Update Item to Revision vs Revert to Revision
...m within Windows Explorer, which will discard the local modifications made by this reverse merge action.
If you simply want to see what a file or folder looked like at an earlier revision, use Update to revision or Save revision as... instead.
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How to convert an Array to a Set in Java
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Generally, avoid parallel. By default it uses a single threadpool accross your application, and the overhead to start threads and join is worse than sequentially streaming through hundreds of items. Only in very few situations does parallel actually br...
Where can I find the Java SDK in Linux after installing it?
...ackage you can determine what files it installs and where it installs them by querying dpkg. For example for the package 'openjdk-6-jdk': dpkg -L openjdk-6-jdk
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“Cannot update paths and switch to branch at the same time”
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You can get this error in the context of, e.g. a Travis build that, by default, checks code out with git clone --depth=50 --branch=master. To the best of my knowledge, you can control --depth via .travis.yml but not the --branch. Since that results in only a single branch being tracked by the...