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What is the logic behind the “using” keyword in C++?
What is the logic behind the "using" keyword in C++?
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What is the right way to check for a null string in Objective-C?
I was using this in my iPhone app
20 Answers
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cartesian product in pandas
... that is repeated for each row, then you can produce a cartesian product using merge (like you would in SQL).
from pandas import DataFrame, merge
df1 = DataFrame({'key':[1,1], 'col1':[1,2],'col2':[3,4]})
df2 = DataFrame({'key':[1,1], 'col3':[5,6]})
merge(df1, df2,on='key')[['col1', 'col2', 'col3']...
TSQL Pivot without aggregate function
...e the MAX aggregate, it would still work. MAX of one value = that value..
In this case, you could also self join 5 times on customerid, filter by dbColumnName per table reference. It may work out better.
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Difference between objectForKey and valueForKey?
... the difference between objectForKey and valueForKey ?
I looked both up in the documentation and they seemed the same to me.
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Create JSON-object the correct way
I am trying to create an JSON object out of a PHP array. The array looks like this:
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Can I use a collection initializer for Dictionary entries?
I want to use a collection initializer for the next bit of code:
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set the width of select2 input (through Angular-ui directive)
I have problem making this plunkr (select2 + angulat-ui) work.
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How to pass anonymous types as parameters?
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I think you should make a class for this anonymous type. That'd be the most sensible thing to do in my opinion. But if you really don't want to, you could use dynamics:
public void LogEmployees (IEnumerable<dynamic> list...
Pure JavaScript Send POST Data Without a Form
Is there a way to send data using the POST method without a form and without refreshing the page using only pure JavaScript (not jQuery $.post() )? Maybe httprequest or something else (just can't find it now)?
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