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How do I extract a sub-hash from a hash?
...
def subhash(*keys)
keys = keys.select { |k| key?(k) }
Hash[keys.zip(values_at(*keys))]
end
end
Hash.send(:include, HashExtensions)
{:a => :A, :b => :B, :c => :C, :d => :D}.subhash(:a) # => {:a => :A}
...
OSGi: What are the differences between Apache Felix and Apache Karaf?
...loading so that you can actually read configuration files, etc. The latest zip file of it is 19.1 MB. Yeah. Small. It can easily run on small devices and work in embedded.
What you may be thinking of is something more like ServiceMix which uses Karaf as a core/kernel. But it includes CXF, Activ...
How can I backup a remote SQL Server database to a local drive?
...u can do is create a backup on the remote server machine, and have someone zip it up and send it to you.
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How to define two fields “unique” as couple
...s, but allow multiple NULL values (see draft wiscorp.com/sql_2003_standard.zip, Framework, p. 22). If you want your unique constraint to disallow multiple null values, you are probably doing something wrong, like using NULL as a meaningfull value. Remember, nullable field says "We don't always have ...
Execute another jar in a Java program
...der. Plugins are a pair of jars - interface and implementation - that are zipped up together. The ClassLoaders all share all the interfaces, while each ClassLoader only has knowledge of its own implementation. The stack's a little complex, but it passes all tests and works beautifully.
use Runtim...
Database sharding vs partitioning
...c example of the 'CustomersEast'
and 'CustomersWest' tables, where their zip code already indicates
where they will be found.
Sharding goes beyond this: it partitions the problematic table(s) in
the same way, but it does this across potentially multiple instances
of the schema. The obvi...
Using GZIP compression with Spring Boot/MVC/JavaConfig with RESTful
... for series of RESTful services and we want to selectively enable HTTP GZIP stream compression on some API responses.
8...
Should we use Nexus or Artifactory for a Maven Repo?
...GI, and can host Yum RPM repositories. In terms of artifact storage, tar, zip, rar, par are included along with the standard java archive types.
– RCross
Jun 26 '14 at 9:24
25
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How can I add new keys to a dictionary?
...value, ignoring the keys
Create a dictionary from two lists
data = dict(zip(list_with_keys, list_with_values))
New to Python 3.5
Creating a merged dictionary without modifying originals:
This uses a new featrue called dictionary unpacking.
data = {**data1, **data2, **data3}
New to Pyt...
Plot a bar using matplotlib using a dictionary
...ib.pyplot as plt
D = {u'Label1':26, u'Label2': 17, u'Label3':30}
plt.bar(*zip(*D.items()))
plt.show()
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