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How to generate a random string in Ruby
I'm currently generating an 8-character pseudo-random uppercase string for "A" .. "Z":
50 Answers
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passing several arguments to FUN of lapply (and others *apply)
...n the lapply call as an argument, like so:
lapply(input, myfun, arg1=6)
and lapply, recognizing that arg1 is not an argument it knows what to do with, will automatically pass it on to myfun. All the other apply functions can do the same thing.
An addendum: You can use ... when you're writing you...
Proper Linq where clauses
...e noticed that when using where clauses, there are many ways to write them and each have the same results as far as I can tell. For example;
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How to change line width in ggplot?
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Whilst @Didzis has the correct answer, I will expand on a few points
Aesthetics can be set or mapped within a ggplot call.
An aesthetic defined within aes(...) is mapped from the data, and a legend created.
An aesthetic may also be set to a single value, by defining it o...
“x not in y” or “not x in y”
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They always give the same result.
In fact, not 'ham' in 'spam and eggs' appears to be special cased to perform a single "not in" operation, rather than an "in" operation and then negating the result:
>>> import dis
>>> def notin():
'ham' not in 'spam and eggs'
&g...
What's the difference between std::move and std::forward
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std::move takes an object and allows you to treat it as a temporary (an rvalue). Although it isn't a semantic requirement, typically a function accepting a reference to an rvalue will invalidate it. When you see std::move, it indicates that the value ...
How to dynamic new Anonymous Class?
...lared. They have little to do with dynamic.
Now, if you were to use an ExpandoObject and reference it through a dynamic variable, you could add or remove fields on the fly.
edit
Sure you can: just cast it to IDictionary<string, object>. Then you can use the indexer.
You use the same castin...
Reading a binary file with python
...particularly difficult reading binary file with Python. Can you give me a hand?
I need to read this file, which in Fortran 90 is easily read by
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Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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Update
data.table v1.9.6+ now supports OP's original attempt and the following answer is no longer necessary.
You can use DT[order(-rank(x), y)].
x y v
1: c 1 7
2: c 3 8
3: c 6 9
4: b 1 1
5: b 3 2
6: b 6 3
7: a 1 4
8: a 3 5
9: a 6 6
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vim repeat find next character 'x'
...s a word (or more words) containing 'x' in between the word I want to edit and the beginning cursor position.
2 Answers
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