underscore.js

问题 For creating this structure i want to use only underscore.js methods. I have below array . var xyz = [{ 'name': 'test' },{ 'name': 'test1' },{ 'name': 'test2' },{ 'name': 'test3' },{ 'name': 'test4' },{ 'name': 'test5' }]; And HTML structure should create like this - <ul> <li> <div><span>test3</span></div> <div><span>test4</span></div> <div><span>test5</span></div> </li> <li> <div><span>test6</span></div> <div><span>test7</span></div> <div><span>test8</span></div> </li> </ul> I am using React

问题 I have my original objects as follow. All I need is to just extract few properties from existing one and create new object. var data = [{ id: 3, name: Axe, location: alkt }, { id: 5, name: Roy, location: grelad }] I need my output as, var data_new = [{ id: 3, name: Axe }, { id: 5, name: Roy, }] How to implement in underscore js or any simple method. Possible its a large JSON object. 回答1: If there are just few properties you want to extract then simple Array.prototype.map will works fine: var

问题 I have an object with functions as properties: var o = { "f1":function(){alert('invoke one');}, "f2":function(){alert('invoke two');}, "f3":function(){alert('invoke three');} }; I am planning to use _.each of http://underscorejs.org/ to invoke them. So, my invocation will look like _.each(o, function(f){f();}); what irritates is the second parameter for _.each. If there is a such function "invoke", I could just call _.each(o,invoke); I know that defining invoke is fairly easy: function invoke

问题 I'm getting an array back from an URL which looks like this: [ { id : 1, product_id : 101, price_new : 80, price_old : 90 }, { id : 2, product_id : 101, price_new : 80, price_old : 90 }, { id : 3, product_id : 102, price_new : 80, price_old : 90 }, ] I would like to transform this, to: [ { product_id : 101, offers : [ { id: 1 price_new : 80, price_old : 90 },{ id: 2 price_new : 80, price_old : 90 }] }, { product_id : 102, offers: [{ id : 3, price_new : 80, price_old : 90 }] }, ] Anyone who

问题 I have this example where some points get spawned over time with a slider. My version is almost working but something that I cant get my head around is this problem: 1) Shows hot is should be plotted from the beginning to end 2) Shows when is actual drage/click on the timeline to the end 3) Shows when I click to the end at once (no dragging) the date is filtered in this function and it should work in my understanding. The example and my version are both using underscore.js where my knowledge

问题 I have an app in backbone where I get data from a server and return me data about hotel. Each hotel can contain many rooms (Single, double, triple..). For this I have create two json hotel.json: [ { "id": "1", "name": "Hotel1" }, { "id": "2", "name": "Hotel2" }, { "id": "3", "name": "Hotel3" } ] rooms.json [ { "room" : [ { "id" : "r1", "hotel_id" : "1", "name" : "Singola", } ] }, { "room" : [ { "id" : "r1_1", "hotel_id" : "1", "name" : "Doppia", } ] }, { "room" : [ { "id" : "r2", "hotel_id" :

问题 Using jquery , underscore or pure javascript what is the best way to remove the first char of a given string? I will make something like this: "aamerica".substring(1,"aamerica".length); "aamerica".slice(1); Is better to use slice or substring? 回答1: You would actually be fine doing: "aamerica".substring(1); EXAMPLE substring's second parameter is optional: string.substring(indexA[, indexB]) 回答2: "aamerica".substring(1); your "aamerica".length; is unecessary quote from doc: string.substring

问题 I am trying to implement backgrid pagination on my backbone collection. It works fine until I implement the filter. After I filter my collection, the paginator's page number changes but when I click the other page, nothing happens. Here's my model and collection with the filter function: var Project = Backbone.Model.extend({}); var ProjectCollection = Backbone.PageableCollection.extend({ model: Project, state: {pageSize: 2}, mode: "client", queryParams: { currentPage: "current_page", pageSize

问题 I have a few tabs on my page, whose contents (consisting of many SetView contained by SetListView ) are loaded using Backbone.js whenever its tabs is being clicked on. Problem:: When the user switches from a tab to a previously loaded/viewed tabbed, the contents load again and append to the previously loaded content in SetListView . I can get it to clear the previously loaded contents before loading it again, but it seems to be less than optimal to keep loading the same content. Is it

问题 I'm using IBM Worklight Developer Edition 6.1 installed in Eclipse Juno as my IDE and backbonejs as my main javascript framework for my project. My index.html <!doctype html> <!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en"> <![endif]--> <!--[if IE 7]> <html class="no-js ie7 oldie" lang="en"> <![endif]--> <!--[if IE 8]> <html class="no-js ie8 oldie" lang="en"> <![endif]--> <!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]--> <head> <meta charset="utf-8"> <meta http