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What is the difference between UNION and UNION ALL?
What is the difference between UNION and UNION ALL ?
26 Answers
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Check if the number is integer
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does the tolerance-checking suggestion really work?? x <- 5-1e-8; x%%1 gives 0.9999999 (which would imply if tol==1e-5 for example) that x is not an integer.
– Ben Bolker
Jan 24 '14 at 15:34
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Check if checkbox is checked with jQuery
...here is more than one checkbox with that class name. The is(':checked') really only works on one element.
– John Boker
Apr 17 '13 at 12:59
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combinations between two lists?
...aving trouble wrapping my head around a algorithm I’m try to make. Basically, I have two lists and want to get all the combinations of the two lists.
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Image Segmentation using Mean Shift explained
Could anyone please help me understand how Mean Shift segmentation actually works?
2 Answers
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Why is division in Ruby returning an integer instead of decimal value?
... Oct 24 '13 at 3:17
Andrew Marshall
87.3k1818 gold badges202202 silver badges204204 bronze badges
answered Mar 31 '11 at 16:02
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Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
...ith something like map or collect would be built in, and nobody has to see all the hoops the compiler has to go through to make them work smoothly. In Scala, it's all in a library, and therefore out in the open.
In fact the functionality of map that's supported by its complicated type is pretty adv...
How to get a tab character?
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However, just like literal tabs (ones you type in to your text editor), all tab characters are treated as whitespace by HTML parsers and collapsed into a single space except those within a <pre> block, where literal tabs will be rendered as 8 spaces in a monospace font.
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Why does struct alignment depend on whether a field type is primitive or user-defined?
... The documentation of StructLayoutAttribute is pretty interesting. Basically, only blittable types are controlled through StructLayout in managed memory. Interesting, never knew that.
– Michael Stum♦
Jul 15 '14 at 7:01
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Hamcrest compare collections
...s with Hamcrest:
assertEquals(expectedList, actual.getList());
If you really intend to perform an order-insensitive comparison, you can call the containsInAnyOrder varargs method and provide values directly:
assertThat(actual.getList(), containsInAnyOrder("item1", "item2"));
(Assuming that you...