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What's the best way to join on the same table twice?
...a fan of natural keys and this is a great example why. Natural keys, especially things like phone numbers, can change and frequently so. Updating your database when that change happens will be a HUGE, error-prone headache. *
Method 1 as you describe it is your best bet though. It looks a bit terse ...
const vs constexpr on variables
...u can not modify them. However only PI2 is a compile-time constant. It shall be initialized at compile time. PI1 may be initialized at compile time or run time. Furthermore, only PI2 can be used in a context that requires a compile-time constant. For example:
constexpr double PI3 = PI1; // er...
Assign pandas dataframe column dtypes
... of multiple columns in pd.Dataframe (I have a file that I've had to manually parse into a list of lists, as the file was not amenable for pd.read_csv )
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How to Deserialize XML document
...nt, as it simply mimics the default behaviour; i.e. by default a property called StockNumber is stored as an element named <StockNumber> - no need for attributes for that.
– Marc Gravell♦
May 8 '12 at 6:13
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What is the difference between Collection and List in Java?
... defines an ordered Collection, other sub interfaces are Queue which typically will store elements ready for processing (e.g. stack).
The following diagram demonstrates the relationship between the different java collection types:
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git --git-dir not working as expected
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Thanks this worked! Agreed that this is confusing. Its called Keep It Simple Stupid. You can almost always allow flexibility while at the same time giving defaults that make the most sense VS having a command not work at all.
– Nay
Jan 18 '12...
public static const in TypeScript
...n the run time (unlike in the first example, where the change would not be allowed at all as demonstrated).
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Get generic type of java.util.List
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If those are actually fields of a certain class, then you can get them with a little help of reflection:
package test;
import java.lang.reflect.Field;
import java.lang.reflect.ParameterizedType;
import java.util.ArrayList;
import java.util....
Can I pass an array as arguments to a method with variable arguments in Java?
...ompatibility.
So you should just be able to prepend extraVar to args and call String.format(format, args).
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Convert seconds to HH-MM-SS with JavaScript?
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Granted Moment.js isn't all that big but if all you're doing with it is to convert seconds to hh:mm:ss, it seems like a bit of overkill. Rather use one of the functions suggested in these or other answers.
– Ola Karlsson
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