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What does middleware and app.use actually mean in Expressjs?
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I add a late answer to add something not mentioned in the previous answers.
By now it should be clear that middleware is/are function(s) run between the client request and the server answer. The most common middleware functionality needed are error managing, database in...
SQL UPDATE SET one column to be equal to a value in a related table referenced by a different column
I hope that made sense, let me elaborate:
10 Answers
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Applying .gitignore to committed files
...ere's a lot of files though. I don't want to have do this for every single one
– user880954
Sep 23 '11 at 11:08
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Can an input field have two labels?
...ach information to controls. Each LABEL element is associated with exactly one form control.
Thus, each form control can be referenced by multiple labels, but each label can only reference one control. So if it makes sense to have a second label for a control (and in the situation you describe, it...
Which UUID version to use?
...network card MAC address and a timer. These IDs are easy to predict (given one, I might be able to guess another one) and can be traced back to your network card. It's not recommended to create these.
Version 4: These are generated from random (or pseudo-random) numbers. If you just need to generate...
How can mixed data types (int, float, char, etc) be stored in an array?
I want to store mixed data types in an array. How could one do that?
6 Answers
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HTML 5: Is it , , or ?
... have your html be well-formed xml, that's it. Of course when transforming one into another you have to make sure it's still valid, but is it worth mentioning? :)
– Michael Krelin - hacker
Dec 22 '09 at 14:37
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How does the extend() function work in jQuery?
...ar);
Results in:
A: Foo=null Bar=a
Single Parameter
If you pass just one object to jQuery.extend(), then jQuery assumes that the jQuery object itself is the "first" parameter (ie: the one to be modified), and your object is the "second" (ie: the one to add to the first). So:
console.log( "Bef...
COUNT(*) vs. COUNT(1) vs. COUNT(pk): which is better? [duplicate]
...bleHere.*), use that.
In short, don't use COUNT(1) for anything. It's a one-trick pony, which rarely does what you want, and in those rare cases is equivalent to count(*)
Use count(*) for counting
Use * for all your queries that need to count everything, even for joins, use *
SELECT boss.boss_...
Why compile Python code?
...e .pyc file is almost invariably smaller. Especially if you comment a lot. One of mine is 28419 as .py, but only 17879 as .pyc -- so load time is better as well. Finally, you can precompile top level scripts this way: python -m compileall myscript.py
– fyngyrz
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