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Why is a C++ Vector called a Vector?
... typically considered 2-3 dimensional because of their use in physics. But more generally in mathematics, they just mean a set of numbers that has an order (mathematical sets are orderless, they're like a bag filled with stuff). A vector can have any number of elements.
– Josep...
Set environment variables from file of key/value pairs
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You have a more clean solution, I have a preference for set -o allexport
– heralight
Oct 28 '18 at 9:51
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Fetch the row which has the Max value for a column
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Rails: create on has_one association
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A more concise way to do this is with:
@user.create_shop(params[:shop])
See methods added by has_one in the Ruby on Rails guides.
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Validate uniqueness of multiple columns
... can pass multiple scope params in case you need to validate uniqueness on more than 2 fields. I.e. :scope => [:friend_id, :group_id]
– Dave Rapin
May 2 '11 at 16:36
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Viewing all defined variables [duplicate]
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In [1]: foo = 'bar'
In [2]: %who
foo
You can use the whos magic to get more detail:
In [3]: %whos
Variable Type Data/Info
----------------------------
foo str bar
There are a wealth of other magics available. IPython is basically the Python interpreter on steroids. One conveni...
AssertContains on strings in jUnit
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The failure message for a failing assertThat is way more helpful then an assertTrue
– Mike Rylander
Apr 1 '13 at 15:04
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How to change the default encoding to UTF-8 for Apache?
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How to remove the hash from window.location (URL) with JavaScript without page refresh?
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Passing a single item as IEnumerable
...s. You could use a read-only collection, but that's likely to involve even more wrapping. I think your solution is as neat as it gets.
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