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How to add elements of a Java8 stream into an existing List
...the Collector.supplier() which is required to return a new collection each time.
These collections of intermediate results are then merged, again in a thread-confined fashion, until there is a single result collection. This is the final result of the collect() operation.
A couple answers from Bald...
How do I call ::std::make_shared on a class with only protected or private constructors?
...
Ahh, it's because shared_ptr stores a deleter at the time of instantiation, and if you're using make_shared the deleter absolutely has to be using the right type.
– Omnifarious
Nov 16 '11 at 6:23
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Why am I seeing “TypeError: string indices must be integers”?
...;> type(my_variable)
<class 'tuple'>
So what we did there, this time explicitly:
>>> my_string = "hello world"
>>> my_tuple = 0, 5
>>> my_string[my_tuple]
TypeError: string indices must be integers
Now, at least, the error message makes sense.
Solution
We n...
Why do most fields (class members) in Android tutorial start with `m`?
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I think in these times it's nonsense, especially to do it in your app! "Your classes and functions should be small enough that you don’t need them. And you should be using an editing environment that highlights or colorizes members to make ...
Converting an array of objects to ActiveRecord::Relation
...bjects to an ActiveRecord::Relation? Preferably without doing a where each time.
You cannot convert an Array to an ActiveRecord::Relation since a Relation is just a builder for a SQL query and its methods do not operate on actual data.
However, if what you want is a relation then:
for ActiveRec...
How to check if a string contains only digits in Java [duplicate]
...gex = "\\d+";
As per Java regular expressions, the + means "one or more times" and \d means "a digit".
Note: the "double backslash" is an escape sequence to get a single backslash - therefore, \\d in a java String gives you the actual result: \d
References:
Java Regular Expressions
Java Chara...
How to split a dos path into its components in Python
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I've been bitten loads of times by people writing their own path fiddling functions and getting it wrong. Spaces, slashes, backslashes, colons -- the possibilities for confusion are not endless, but mistakes are easily made anyway. So I'm a stickler f...
Git Cherry-pick vs Merge Workflow
...agues who are damn good at what they do, but don't want to spend the extra time) have an easier time just merging.
Even with a merge-heavy workflow rebase and cherry-pick are still useful for particular cases:
One downside to merge is cluttered history. rebase prevents a long series of commits ...
How to create a GUID/UUID in Python
...; import uuid
>>> # make a UUID based on the host ID and current time
>>> uuid.uuid1()
UUID('a8098c1a-f86e-11da-bd1a-00112444be1e')
>>> # make a UUID using an MD5 hash of a namespace UUID and a name
>>> uuid.uuid3(uuid.NAMESPACE_DNS, 'python.org')
UUID('6fa459ea...
NGINX to reverse proxy websockets AND enable SSL (wss://)?
...e $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_read_timeout 86400;
}
You can also check the nginx changelog and the WebSocket proxying documentation.
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