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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One reason for that is objective. Sometimes you can be clever in JavaScript—if the cleverness has become an established pattern. Allman style and 1TBS.

6.2 Metacode

Whenever you are considering a style question, ask yourself: But it reduces clutter, and I expect engines to eventually optimize this pattern. If you use methods generically, you can abbreviate Object. Prefer constructors over other instance creation patterns I recommend that you: In the latter case, they return a value and while there is a mnemonic, you still need to think to metavode out what is going on: A Meta Code Style Guide.

It should tell you how to get started with the code base mstacode provide you with the big picture.

Code Should Be Consistent. It has been inherited from Java and most style guides recommend it.

First, familiar things are easier to understand. Second, humans read tokens, not characters. Documentation should fill in the blanks left by the code and the comments. So if you are as clever as you can be when you write it, how will you ever debug it? Changing undefined explains why. To write such code, use descriptive identifiers and mrtacode up long functions or methods into smaller subfunctions.


If you are inside a block, stay inside that block As an addendum to the previous rule: ASI can unexpectedly break up statements:. I like relatively tight whitespace. Avoid the pitfalls of automatic semicolon insertion see Automatic Semicolon Insertion. You can write string literals with either single quotes or double quotes in JavaScript.

The rationale is that this is what a named function expression looks like if you remove the name: In modern engines, using instances of constructors is very fast e. If those functions are small enough and have meaningful names, you can often avoid comments. Thus, there is no need to write yet another one. This helps with reading, because it is easier to make out the scope of the operator: Three parts of a code base help: However, you have to find ways to recover gracefully from failure when your code is in production.

The bodies of control flow statements are always put in braces, even if there is only a single statement. Always use new when creating an instance. Code Should Be Easy to Understand.

Initializing an array with elements avoid!

Meta Imaging Series Codes

It is also easier to remove the code fragment or to move it somewhere else. Sometimes you have no choice but to optimize the performance of your code.

The advantages of this approach are that deleting, inserting, and rearranging lines is simpler and the lines are automatically indented correctly. Commonly Accepted Best Practices. If you return an object literal, you must put the opening brace in the same line as the keyword returnlike this otherwise, automatic semicolon insertion inserts a semicolon after returnmeaning that nothing is returned; see Pitfall: More tips for using constructors are mentioned in Tips for Implementing Constructors.


If you need to know a concept to understand the code, you can either include the name of the concept in an identifier or mention it in a comment. JavaScript has many great style guides. It also mentions practices I like that are more controversial.

Two brace styles are most common in C-like languages such as Java and JavaScript: Avoid global variables Best Practice: It is thus important to make the former as easy as possible. 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. The first rule is that, if you start a new project, you should come up with a style, document it, and follow it everywhere. This is more self-explanatory and safer than comparing with undefined or checking for truthiness:.

These are style guides that I like: Put the conditional operator in parentheses This helps with reading, because it is easier to make out the scope of the operator: I prefer four spaces per level of indentation, because that makes the indentation more visible. The following metacide expressions are equivalent: