II//sdss7, Data Release 7 (,, primary sources, plus 65,, that 2 different SDSS objects share the same SDSS name (). 1. J/ApJ//48/sample, Sample source properties (tables 1 and 2) (87 rows) ( Q=QSO, BLZ=blazar, BLRG=broad_line radio galaxy, fnt=faint) (). [0/1] Fmag quality of the PSF fitting Qfit () (CODE_QUALITY). f_Fmag, [0/7] Quality flag (best=1) on Fmag (Note 2) ().
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Avoid global variables Best Practice: If those functions are small metacoce and have meaningful names, you can often avoid comments. For constructors, it is important to use strict mode, because it protects you against forgetting the new operator for instantiation.
This is more self-explanatory and safer than comparing with undefined or checking for truthiness:. It is thus important to make the former as easy as possible. As an exception, I omit braces if a statement can be written in a single line.
The larger the team, the more important it is to check for adherence to the style automatically, via tools such as JSHint. Someone reading the code can then turn to the documentation to find out more about the concept. The idea is to complement existing style guides rather than to replace them. Coercing Coerce a value to a meetacode via BooleanNumberStringObject used as functions—never use those functions as constructors. That can mean that using familiar, slightly more verbose, constructs can be preferable.
And you should be aware that you can return any object in a constructor.
Sometimes you have no choice but to optimize the performance of metacodw code. They make it easier to work with HTML code which normally has attribute values in double quotes.
Chapter A Meta Code Style Guide
The preceding code has the same effect and intention as the following code, which is why it should be written that way:. When it comes to style, there are many decisions to make. Coerce a value to a type via BooleanNumberStringObject used as functions—never use those functions as constructors. In modern engines, using instances of constructors is very fast e. Single quotes are more common.
Code Should Be Easy to Understand. So if you are as clever as you can be when you write it, how will you ever debug it? Avoid Creating Global Variables.
In other words, you can declare a variable in the context in which it is used inside a loop, inside a then block or an else block, etc. As an addendum to the previous rule: Commonly Accepted Best Practices.
I also like to keep object-oriented and functional mechanisms separate: Always use new when creating an instance. In contrast to textbooks, the added challenge with code is that people will not read it linearly.
Other considerations are mentioned in String Literals. For most code, the time used for reading it is much greater than the time used for writing it. Put the conditional operator in parentheses This helps with reading, because it is easier to make out the scope of the operator: In the latter case, they return a value metcode while there is a mnemonic, you still need to think to figure out what is going on: The shift operator can be used to convert a number to an integer.
These are style guides that I like: The latter is normally the better choice: It also mentions practices I like that are more controversial.