yehuda katz

dropped to 0.9555, which is similar to Netflix's 0.9514. 4.3 time changing Factor Model 　　The user's preference changes over time. Similar to formula (9), the user preference transfer formula is obtained (the meaning of each parameter is basically the same as that of formula (9 ): 　　 Merge all the above formulas to obtain the final formula (timesvd ++, which can converge after about 30 iterations ): 　　 Compare the SVD, SVD ++, and timesvd ++ algorithms to obtain the following information: 　 5.

Google search Quality director Matt Katz (Matt Cutts) Lead: In the United States, "the San Jose Messenger," the online version of the Friday article said that in the Google search quality director Matt Katz (Matt Cutts), users of Google's search results to criticize is a good thing, because it can spur Google to further improve the quality of search, so as to enhance the user experience. The following is

": " Pear "," Count ": 3},{" name ":" Orange "," count ": +},]var newArr = []; for (var i = 0; i ) { if (arr[i].name = = = "Orange") { NEWARR . push (Arr[i]);} } Console.log ("Filter results:", NEWARR);The filter () is used:var newArr = Arr.filter (function(item) { return item.name = = = "Orange";});Console.log ("Filter results:", NEWARR);3. ForEach ()foreach executes the corresponding method for each element, which is used to replace the for loop.var arr = [1, 2, 3, 4, 5, 6, 7,

can use the {{{} Use such a data context: { title: ' All About The result: Handlebars does not encode handlebars.safestring. If you customize a helper, return a section of HTML code, you need to return to new handlebars.safestring (result). At this point, you need to encode the content manually: Handlebars.registerhelper (' link ', function (text, URL) { text = Handlebars.Utils.escapeExpression (text); URL = Handlebars.Utils.escapeExpression (URL); var result = ' This wi

to each element in the array, and returns a new array(1) Do not use map ()var oldarr = [{first_name: "Colin", last_name: "Toh"},{first_name: "Addy", last_name: "Osmani"},{first_name: " Yehuda ", last_name:" Katz "}]; function Getnewarr () { var newArr = []; for (var i= 0, L = oldarr.length; i) { var item = oldarr[i]; = [Item.first_name,item.last_name].join (""); = ite

function to execute the context (contextual), which is the object of this binding. This method is used in many JavaScript techniques as well as in class libraries. Let's look at a specific example:Listing 7. Point2.jsfunction point (x, y) { this.x = x; This.y = y; This.moveto = function (x, y) { this.x = x; This.y = y; } } var p1 = new Point (0, 0); var P2 = {x:0, y:0}; P1.moveto (1, 1); P1.moveTo.apply (P2, [10, 10]);In the example above, we use the constru

parameter is not uniformly passed in as an array, but separately passed in.A different angle to understandIf like the author, we also think that the above four ways not easy to remember, after a period of time, and do not understand what this refers to. So I recommend this article to Yehuda Katz: Understanding JavaScript Function Invocation and "this". In this article,

, 10]);In the example above, we use the constructor to generate an object P1, which has a moveTo method, and another object is created using the object literal P2, and we see that using apply can apply the P1 method to P2, when this is also bound to the object P2. Another method call has the same function, the difference is that the last parameter is not uniformly passed in as an array, but separately passed in.A different angle to understandIf like the author, we also think that the above four

= arr.length i 2, filter () The filter () method creates an array of new matching filter criteria. Without filter (): var arr=[{"name": "Apple", "Count": 2},{"name": "Orange", "Count": 5},{"name": "Pear", "count": 3},{"name": "Orange", " Count ":",] var newArr = []; for (var i = 0; i Using the filter (): var newArr = arr.filter (function (item) {return Item.name = = "Orange"; }); 3, ForEach () foreach executes the corresponding method for each element, and i

: * The numbers in the brackets indicate the number of contributors on GitHub at a recent time point, roughly representing their respective influences.What does it mean?● The JavaScript library is inserted into the existing architecture to supplement specific functions.● The JavaScript framework provides an architecture (file structure, and so on). You must abide by it. As long as you comply with it, all the rest will be dealing with general requirements.Currently, Ember is the most powerful adv

object literal P2, and we see that using apply can apply the P1 method to P2, when this is also bound to the object P2. Another method call has the same function, the difference is that the last parameter is not uniformly passed in as an array, but separately passed in.A different angle to understandIf like the author, we also think that the above four ways not easy to remember, after a period of time, and do not understand what this refers to. So I recommend this article to

", "Count": 5}, {"name": "Pear", "Count": 3}, { "Name": "Orange", "Count": +},]; var newArr = [];for (var i= 0, L = arr.length; i3) ForEach ()foreach executes the corresponding method for each elementegvar arr = [1,2,3,4,5,6,7,8];//Uses the usual ' for ' Loop to Iteratefor (Var i= 0, L = arr.length; iCompareforeach is used to replace a for loop4) Map ()Map () A new array is returned after each element of the array is manipulated (mapped)egvar Oldarr = [{first_name: "Colin", last_name: "

used:var arr = [{"name": "apple", "count": 2},{"name": "orange", "count": 5},{"name": "pear", "count": 3},{"name": "orange", " Count ": 16},];var newArr = arr.filter (function (item) {return item.name = = =" Orange ";}); Console.log ("Filter results:", newArr);3) ForEach ()foreach executes the corresponding method for each elementvar arr = [1,2,3,4,5,6,7,8];//Uses The usual ' for ' loop to iteratefor (var i= 0, l = arr.length; iforeach is used to replace a for loop4) Map ()Map () after each ele

9 10 11 12-13 var arr = [{' name ': ' Apple ', ' Count ': 2}, {' name ': ' Orange ', ' Count ': 5}, {' name ': ' Pear ', ' count ': 3}, {"name": "Orange", "Count": 16},]; var newArr = arr.filter (function (item) {return item.name = = "Orange";}); Console.log ("Filter results:", NEWARR); 3) ForEach () foreach executes the corresponding method for each element? 1 2 3 4 5 6 7 8 9 10 11 12-13 var arr = [1,2,3,4,5,6,7,8]; Uses the usual ' for ' loop to iterate for (

advantage of this approach is so you don ' t limit your view of what's possible to the language that's the most fam Iliar with.I have noticed that my comprehensive ability to develop software has been significantly improved as I go to learn new languages and use new frameworks. It's not as easy as it is, the key is that you can't limit your vision, and don't put yourself in a language of development that you're most familiar with.I recently dipped my toes in ember.js and learned so the creators

respective influence. *What do you mean? JavaScript library , plugged into an existing architecture, complements specific functionality. JavaScript Framework , which provides a schema (the file structure ah, and so on), you have to obey it, as long as you obey, the rest is to deal with the general requirements. For now, the most mater hard of the advocacy framework model is Ember, whose creator Yehuda

corresponding method for each element var arr = [1,2,3,4,5,6,7,8]; Uses the usual "for" loop to iterate for (Var i= 0, L = arr.length; i foreach is used to replace the For loop 4) Map () Map () After each element of the array is manipulated (mapped), a new array is returned, Do not use map var Oldarr = [{first_name: "Colin", last_name: "Toh"},{first_name: "Addy", Last_Name: "Osmani"},{first_name: "Yehuda", Last_Name: "

Create a Person classPerson = Ember.Object.extend ({ function (thing) { alert (thing);}});Create a person object that is an instance of the person classvar person = person.create ();p Erson.say ("Hello//Alerts" Hello " When you create an instance, you can also add additional properties to the instance by passing in the object var tom = person.create ({name: " tom dalehelloworld: function () {this.say ( "hi my name is " + this.get ( ' name //alerts "Hi My name is Tom Dale" When you create

components in angular. After that, you can declare your custom components using HTML tags.View Code Demo: Http://jsbin.com/lacog/2/editThis example shows how simple it is to use the angular instruction. Values scope Define the attributes that are obtained from the element and are my-avatar then used to build the corresponding IMG tag and render it into the user's avatar.EmberThe frame and library debate is protracted, and the general framework is to force you to do things in a certain way, so i

together and even have its (optional) node. the degree of the JS server. Advantages: the code library is very clear, the binding method is excellent, simple, durable, and streamlined. Disadvantages: The author does not like this "Lone hero" style, let alone the idea of strengthening a single controller. Like knockout and angular, components are also suffering from nesting. The author needs not only templates, but also declarative reusable template frameworks. In contrast, Ember has a complete s