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What is Full Text Search vs LIKE
...ntations use an "inverted index". This is an index where the keys are individual terms, and the associated values are sets of records that contain the term. Full text search is optimized to compute the intersection, union, etc. of these record sets, and usually provides a ranking algorithm to quanti...
What is difference between MVC, MVP & MVVM design pattern in terms of coding c#
... discuss the difference between MVC MVP & MVVM design pattern theoretically like :
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How do I get the row count of a pandas DataFrame?
...1000000 loops, best of 3: 573 ns per loop
Due to one additional function call it is a bit slower than calling len(df.index) directly, but this should not play any role in most use cases.
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node.js execute system command synchronously
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Use ShellJS module.
exec function without providing callback.
Example:
var version = exec('node -v').output;
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What do *args and **kwargs mean? [duplicate]
...ect-oriented programming, when you’re overriding a function, and want to call the original function with whatever arguments the user passes in.
You don’t actually have to call them args and kwargs, that’s just a convention. It’s the * and ** that do the magic.
The official Python documenta...
In C#, What is a monad?
...When you say this you mean "first do a, then do b". The result a; b is basically again a computation that can be combined together with more stuff.
This is a simple monad, it is a way of combing small computations to bigger ones. The ; says "do the thing on the left, then do the thing on the right"....
How to get the source directory of a Bash script from within the script itself?
...give you the full directory name of the script no matter where it is being called from.
It will work as long as the last component of the path used to find the script is not a symlink (directory links are OK). If you also want to resolve any links to the script itself, you need a multi-line solutio...
How do I define a method which takes a lambda as a parameter in Java 8?
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Lambdas are purely a call-site construct: the recipient of the lambda does not need to know that a Lambda is involved, instead it accepts an Interface with the appropriate method.
In other words, you define or use a functional interface (i.e. an...
Are PHP functions case sensitive?
I was digging through some code, and I found some calls to mySQL_fetch_array . Is PHP case sensitive about function names? I recall reading this somewhere but can't seem to find any reference to it.
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Is returning null bad design? [closed]
...f I were to define a method in Java that returned a Collection I would typically prefer to return an empty collection (i.e. Collections.emptyList()) rather than null as it means my client code is cleaner; e.g.
Collection<? extends Item> c = getItems(); // Will never return null.
for (Item it...