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What's the difference between lapply and do.call?
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Although there have been many answers, here is my example for reference.
Suppose we have a list of data as :
L=list(c(1,2,3), c(4,5,6))
The function lapply returns a list.
lapply(L, sum)
The above means something like below.
list( sum( L[[1]]) , sum( L[[2]]))
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How would you count occurrences of a string (actually a char) within a string?
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OutOfMemoryException is thrown for my 210000 chars of string.
– ender
Sep 13 '13 at 8:47
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show 4 mo...
Undo changes in entity framework entities
... to use the the generic version of Entries<T>() so that it works for my respositories. This gives me more control and I can roll back per entity type. Thanks!
– Daniel Mackay
Aug 17 '17 at 23:55
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What is the difference between iterator and iterable and how to use them?
... Thanks for an intelligent answer. I came here to double check my understanding of Iterable vs Iterator. You confirmed it. All the other answers talk about the structure, which I guess is fine, but doesn't answer the question of WHY I'd use one over the other.
– Eri...
Check if list of objects contain an object with a certain attribute value
I want to check if my list of objects contain an object with a certain attribute value.
1 Answer
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How do I copy a hash in Ruby?
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Thanks for point this out, my hash still got affected when using dup or clone
– Esgi Dendyanri
Jun 7 '17 at 12:39
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How do I format a string using a dictionary in python-3.x?
...gt;>> 'foo is {foo}, bar is {bar} and baz is {baz}'.format(**d)
on my Python 3.4.3. The difference would probably be larger as more keys are in the dictionary, and
Note that the format language is much more flexible than that though; they can contain indexed expressions, attribute access...
How to embed a SWF file in an HTML page?
...gt;
<script type="text/javascript">
swfobject.embedSWF("myContent.swf", "myContent", "300", "120", "9.0.0");
</script>
</head>
<body>
<div id="myContent">
<p>Alternative content</p>
</div>
</body>
</html&g...
How to run Rake tasks from within Rake tasks?
..."].invoke
end
end
That should sort you out, just needed the same thing myself.
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Is log(n!) = Θ(n·log(n))?
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Thanks, I found your answers convincing but in my case, I must use the Θ properties:
log(n!) = Θ(n·log n) => log(n!) = O(n log n) and log(n!) = Ω(n log n)
to verify the problem I found this web, where you have all the process explained: http://www.mcs.sdsmt.edu...