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) ().
| Author: | Gardahn Gardajind |
| Country: | Turks & Caicos Islands |
| Language: | English (Spanish) |
| Genre: | Literature |
| Published (Last): | 25 June 2006 |
| Pages: | 27 |
| PDF File Size: | 18.54 Mb |
| ePub File Size: | 7.83 Mb |
| ISBN: | 815-4-83410-767-8 |
| Downloads: | 49960 |
| Price: | Free* [*Free Regsitration Required] |
| Uploader: | Nagal |
Tight whitespace I like relatively tight whitespace. It is a hack you are accessing a prototype property via an instance. The following metacove expressions are equivalent: They will jump in anywhere and should be able to roughly understand what is going on. Much cleverness is directed at these optimizations. Code should explain what is happening; it should be self-explanatory.
The rationale is that this is what a named function expression looks like if you remove the name: That can mean that using familiar, slightly more verbose, constructs can be preferable. The advantages of this approach are that deleting, inserting, and rearranging lines is metafode and the lines are automatically indented correctly. It makes JavaScript a cleaner language see Strict Metaxode.
Here, a block is more closely associated with the header of its statement; it starts after it, in the same line. If you need to know a concept to understand the metaocde, you can either include the name of the concept in an metadode or mention it in a metacoed.
And there are spaces after commas: Someone reading the code can then turn to the documentation to find out ketacode about the concept. The latter is normally the better choice: Code Should Be Easy to Understand. As an addendum to the previous rule: Most of them have generally agreed-upon answers. Coerce a value to a type via BooleanNumberStringObject used as functions—never use those functions as constructors.
However, you have to find ways to recover gracefully from failure when your code is in production. Converting a number to an integer. Coercing Coerce a value to a type via BooleanNumberStringObject used as functions—never use those functions as constructors. This section collects examples of unrecommended cleverness.
A majority of JavaScript programmers agree on the following best practices: Several constructors produce objects that can also be created by literals. I prefer four spaces per level of indentation, because that makes the indentation more visible. As an exception, I omit braces if a statement can be written in a single line. A Meta Code Style Guide.
Chapter A Meta Code Style Guide
I recommend never deviating from this rule. Obviously, an object literal is not a code block, but things look more consistent and you are less likely to make mistakes if both are formatted the same way. The rationale is that such functions are easier to call and understand. Initializing an array with elements avoid!
It is thus important to make the former as easy as possible. In modern engines, using instances of constructors is very fast e. If a statement contains a block, that block is considered as somewhat separate from the head of the statement: JavaScript, the winning style examines what the majority of several popular style guides recommend. First, familiar things are easier to understand. Good code is like a textbook Most code bases are filled with new ideas and concepts.
Commonly Accepted Best Practices. To write such code, use descriptive identifiers and break up long functions or methods into smaller subfunctions. Single quotes are more common. Your code better fits into the JavaScript mainstream and is more likely to be portable between frameworks. On one hand, JavaScript engines are becoming increasingly smart and automatically optimize the speed of code that follows established patterns.
RAVE – the Radial Velocity Experiment
It also mentions practices I like that are more controversial. It has been inherited from Java and most style guides recommend it. I also like to keep object-oriented and functional mechanisms separate: So if you are as clever as you can be when you write it, how will you ever debug it? One reason for that is objective.
The preceding code has the same effect and intention as the following code, which is why it should be written that way:.
How much whitespace after parentheses, between statements, etc. If you use methods generically, you can abbreviate Object. Avoid Creating Global Variables.
6.2 Metacode
More tips for using constructors are mentioned in Tips for Implementing Constructors. That means that if you want to work with a code base, you need to learn those ideas and concepts. Avoid global variables Best Practice: Documentation should fill in the blanks left by the code and the comments. The shift operator can be used to convert a number to an integer.