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What's the difference between an id and a class?
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TBH, nobody use id any more unless it has something to do with integration with JavaScript (when you need an unique value). It is html leftover and you do not need to use it just because it exists. Saying that you have only one header and such so y...
What are the basic rules and idioms for operator overloading?
...facing for the bit-manipulation functions they inherit from C, have become more prevalent as overloaded stream input and output operators in most applications. For guidance overloading as bit-manipulation operators, see the section below on Binary Arithmetic Operators. For implementing your own cu...
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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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
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foo str bar
There are a wealth of other magics available. IPython is basically the Python interpreter on steroids. One conveni...
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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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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