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How to use JUnit and Hamcrest together?
I can't understand how JUnit 4.8 should work with Hamcrest matchers. There are some matchers defined inside junit-4.8.jar in org.hamcrest.CoreMatchers . At the same time there are some other matchers in hamcrest-all-1.1.jar in org.hamcrest.Matchers . So, where to go? Shall I explicitly inclu...
Designing function f(f(n)) == -n
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Hmm, saving state with even and odd numbers, I should've thought of that.
– Unknown
Apr 8 '09 at 22:25
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Algorithm for creating a school timetable
...ble. Basically, it's about optimizing "hour-dispersion" (both in teachers and classes case) for given class-subject-teacher associations. We can assume that we have sets of classes, lesson subjects and teachers associated with each other at the input and that timetable should fit between 8AM and 4P...
What is a “callback” in C and how are they implemented?
From the reading that I have done, Core Audio relies heavily on callbacks (and C++, but that's another story).
9 Answers
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Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
I'm working on a UI for an app, and I'm attempting to use grayscale icons, and allow the user to change the theme to a color of their choosing. To do this, I'm trying to just apply a ColorFilter of some sort to overlay a color on top of the drawable. I've tried using PorterDuff.Mode.MULTIPLY, and it...
Fast way of finding lines in one file that are not in another?
...ile1 file2
The input files should be sorted for this to work. With bash (and zsh) you can sort in-place with process substitution <( ):
diff --new-line-format="" --unchanged-line-format="" <(sort file1) <(sort file2)
In the above new and unchanged lines are suppressed, so only changed...
What is the difference between Numpy's array() and asarray() functions?
What is the difference between Numpy's array() and asarray() functions? When should you use one rather than the other? They seem to generate identical output for all the inputs I can think of.
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REST URI convention - Singular or plural name of resource while creating it
I'm new to REST and I've observed that in some RESTful services they use different resource URI for update/get/delete and Create. Such as
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Does JavaScript guarantee object property order?
... iteration order is a combination of the insertion order for strings keys, and ascending order for number-like keys:
// key order: 1, foo, bar
const obj = { "foo": "foo", "1": "1", "bar": "bar" }
Using an array or a Map object can be a better way to achieve this. Map shares some similarities with O...
What is the difference between ELF files and bin files?
The final images produced by compliers contain both bin file and extended loader format ELf file ,what is the difference between the two , especially the utility of ELF file.
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