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How to print the contents of RDD?
...ion is to write in multiple files in HDFS, then use hdfs dfs --getmerge in order to merge the files
– Oussama
Jul 21 '15 at 16:10
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What is scope/named_scope in rails?
... scope :fresh, -> { where('age < ?', 25) }
scope :recent, -> { order(created_at: :desc) }
end
And you call
Zombie.rotting.fresh.recent.limit(3)
It translates to the below in SQL,
select "zombies.*" from "zombies" where "zombies"."rotting" = 't' and (age<20) order by create_at de...
R data formats: RData, Rda, Rds etc
...Rda is just a short name for RData. You can just save(), load(), attach(), etc. just like you do with RData.
Rds stores a single R object. Yet, beyond that simple explanation, there are several differences from a "standard" storage. Probably this R-manual Link to readRDS() function clarifies such d...
What does ** (double star/asterisk) and * (star/asterisk) do for parameters?
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The output of [6] is in reverse order. name one age 27
– thanos.a
Jan 8 '17 at 21:11
61
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CSS selector for first element with class
...t all .red children of .home, including the first one,
* and give them a border.
*/
.home > .red {
border: 1px solid red;
}
... then "undo" the styles for elements with the class that come after the first one, using the general sibling combinator ~ in an overriding rule:
/*
* Select al...
How to iterate through SparseArray?
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Is this guaranteed to be in key order?
– HughHughTeotl
Apr 27 '19 at 20:53
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What is Autoloading; How do you use spl_autoload, __autoload and spl_autoload_register?
...spl_autoload_register() with anonymous function rule just after 1st one in order o manually include missing parent / inherited classes.
– stamster
Jul 27 '17 at 21:54
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How to change the order of DataFrame columns?
... + cols[:-1]
In [13]: cols
Out[13]: ['mean', 0L, 1L, 2L, 3L, 4L]
Then reorder the dataframe like this:
In [16]: df = df[cols] # OR df = df.ix[:, cols]
In [17]: df
Out[17]:
mean 0 1 2 3 4
0 0.445543 0.445598 0.173835 0.343415 0.682252 ...
looping through an NSMutableDictionary
...] to get an NSArray of your values. Be aware that it doesn't guarantee any order between calls.
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What is a magic number, and why is it bad? [closed]
... update.
For example, let's say you have a Page that displays the last 50 Orders in a "Your Orders" Overview Page. 50 is the Magic Number here, because it's not set through standard or convention, it's a number that you made up for reasons outlined in the spec.
Now, what you do is you have the 50 ...