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How to solve error “Missing `secret_key_base` for 'production' environment” (Rails 4.1)
...environment variable for the secret_key_base in your production server. In order to solve this error you should follow these steps to create an environment variable for Linux (in my case Ubuntu) in your production server:
In the terminal of your production server execute:
$ RAILS_ENV=production r...
How does lucene index documents?
... Yes, you are correct. The only thing to mention is the final order is defined using sorting rules (relevance index in trivial case), thus the order in which segments are searched isn't relevant.
– Denis Bazhenov
Jul 19 '16 at 5:25
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Why should I not include cpp files and instead use a header?
..., x = y + 1, that means you have to compile all two million lines again in order to test this. And if you find out that you meant to do a x = y - 1 instead, then again, two million lines of compile are waiting for you. That's many hours of time wasted that could be better spent doing anything else...
How to add elements of a Java8 stream into an existing List
...TE: nosid's answer shows how to add to an existing collection using forEachOrdered(). This is a useful and effective technique for mutating existing collections. My answer addresses why you shouldn't use a Collector to mutate an existing collection.
The short answer is no, at least, not in general,...
What are the big improvements between guava and apache equivalent libraries?
...)
builder pattern (ImmutableList.builder(), Joiner, CharMatcher, Splitter, Ordering, ...)
immutability (immutable collections, CharMatcher, Joiner, Splitter,...)
implementation hiding (Predicates.xXx, ...)
favoring composition over inheritance(the ForwardXXX collections)
null-checks
enum-singleton p...
Fitting empirical distribution to theoretical ones with Scipy (Python)?
...ome continuous distribution. The values in the list are not necessarily in order, but order doesn't matter for this problem.
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Difference Between Select and SelectMany
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I understand SelectMany to work like a join shortcut.
So you can:
var orders = customers
.Where(c => c.CustomerName == "Acme")
.SelectMany(c => c.Orders);
share
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Parsing a CSV file using NodeJS
... NodeCSV is also well supported and happens to have approximately one order of magnitude more users. npmjs.com/package/csv
– steampowered
Jun 16 '15 at 16:21
4
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Removing duplicates from a list of lists
...[[1, 2], [4], [5, 6, 2], [3]]
Simple to comprehend, and you preserve the order of the first occurrence of each element should that be useful, but I guess it's quadratic in complexity as you're searching the whole of new_k for each element.
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Filtering a data frame by values in a column [duplicate]
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