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In many cases, in order to make the program easier to read, and some else can use a single method or function calls encapsulation: // statements using else if (user.permissionGroup == 'administrator') {article.delete () ;} else {page.showError (\u0026 quot; Sorry you do not have permission to delete this article \u0026 quot;);} // do not use the else statement if {page.showError (\u0026 quot (user.deleteArticle (article)!); Sorry you do not have permission to delete this article \u0026 quot;);} using a switch statement or multiple if..else if statement, Air Jordan 3 Retro you may consider using different types to replace: class User {function deleteArticle ($ article) {$ success = false; if (user- \u0026 amp; gt; permissionGroup == 'administrator' || user- \u0026 amp; gt; permissionGroup == 'editor') {$ success = $ article- \u0026 amp; gt; delete ();} return $ success ;}} You can design a special type of deleted here if statement: trait ArticleDeletion {function deleteArticle ($ Nike shoes online article) {return $ article- \u0026 amp; gt; delete ();}} class Editor implements User {use ArticleDeletion; } class Administrator implements User {use ArticleDeletion;} Note that I carefully selected composition Administrator and Editor, rather than inherited from Administrator Editor. This can keep my program structure is more flat and flexible. It is a combination of a superior example of the principle of succession. Depth view of the package can let the program at a more abstract level, easy to understand, so the focus will be separated by not packaged together to maintain a single criterion responsibility is very important. For example, you can write like this: var user = new User (); user.UpdateFromForm (); // user data user.SaveToDatabase importing objects from a page table (); While this write very short very clear, but also with to two issues: the user can find some basic information through more in-depth inspection code to, such as database name of the class, or the details of which will be stored in the table and so on. If we want to use another instance of the database, we have to re-edit the user class. This does not make much sense. 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By using dependency injection or features / multiple inheritance to achieve a combination of superior inheritance principle, we can simultaneously achieve these two objectives. Specialized syntax in many languages, there is usually a slightly incomprehensible structure can reduce the time. Most of these structures exist tradeoffs between readability and efficiency. Ternary operator with null coalescing operator C # and PHP has a null coalescing operator: var userType = user.Type ?? defaultType; // C # $ userType = $ user- \u0026 amp; gt; Type: $ defaultType;? // PHP and almost all languages support the ternary operator: var userType = user.Type = null user.Type: defaultType; Air 2012 Nike Dunk High Heels Blue Black Cute Girl Jordan 19 these two structures than if..else structure is more simple, but relatively speaking,!? They are not clear enough semantics, so there are trade-offs. Personally, I think the use of the ternary operator under simple conditions like this is no problem. 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Such one-time variable defined variables are not worth following: var arrayLength = myArray.length; for (var arrayIterator; arrayIterator \u0026 amp; lt; arrayLength; arrayIterator ++) {...} In some cases, the variable can be used to add a useful semantic information. For example: var slideshowContainer = jQuery ('main \u0026 amp; gt; .show'); slideshowContainer.startSlideshow ();how to write expressive code?