object | 易学教程

how to convert JSONString to Javascript Object

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问题 I need some help on the JavaScript. I do a ajax call on a button click, which returns the below String and this is generated using GSON(basically it is a JSON object). { "chart":{ "renderTo":"container", "type":"bar" }, "title":{ "text":"Engagement Per Vendor Per GBP" }, "subtitle":{ "text":"ASPT" }, "xAxis":{ "categories":[ "A", "B", "C", "D" ], "title":{ "text":"Engagement Per Vendor Per GBP" } }, "yAxis":{ "min":0, "title":{ "text":"Count", "align":"high" } }, "plotOptions":{ "bar":{

Accessing a pages object using a Chrome Extension

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问题 I simply have to access an object that is a variable on the page that I am running my content script on from my Chrome Extension. I know about the environments and their isolated worlds in which the content scripts and injected scripts run and that it's possible to get some variables using the injected scripts and then send them back. I have searched for other answers regarding this question and most work for other type of variables and are the basic way of doing it but none currently work

idea for循环快捷键

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idea中各种for循环的快捷键使用Intellij idea 时，想要快捷生成for循环代码块 itar 生成array for代码块 for (int i = 0; i < array.length; i++) { = array[i]; } itco 生成Collection迭代 for (Iterator iterator = collection.iterator(); iterator.hasNext(); ) { Object next = iterator.next(); } iten 生成enumeration遍历 while (enumeration.hasMoreElements()) { Object nextElement = enumeration.nextElement(); } iter 生成增强for循环 for (String arg : args) { } itit 生成iterator 迭代 while (iterator.hasNext()) { Object next = iterator.next(); } itli 生成List的遍历 for (int i = 0; i < list.size(); i++) { Object o = list.get(i); } ittok 生成String token遍历 for

Sort object keys with Handlebars

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问题 I know that Javascript object keys are not 'ordered' so by definition cannot be sorted – however I would like to output them in alphabetical order using Handlebars for display purposes. The part of the object I'm interested in looks like this: { "A publisher" : { journals : { "A journal" : {}, "B journal" : {}, "C journal" : {} } } "B publisher" : { journals : { "D journal" : {}, "E journal" : {}, "F journal" : {} } } } I'd like to be able to template the object using Handlebars ordered

Displaying objects using foreach loop

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问题 I am having a problem while retrieving data from an ArrayList and displaying them into textboxs. I am getting an error: Unable to cast object of type 'Lab_9.Book' to type 'Lab_9.Magazine' . I tried use 2 foreach loops but that seems to be out of the question. How could I avoid this problem? Problem occurs here: // Displaying all Book objects from pubs ArrayList. foreach (Book list in pubs) { bookNumber++; // Count books from the begining. // Displaying and formating the output // in

Performance: findIndex vs Array.prototype.map [duplicate]

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问题 This question already has answers here : In an array of objects, fastest way to find the index of an object whose attributes match a search (17 answers) Closed 10 months ago . In 2019, if I am handling an array of objects, with a length north of say 15000 and I need to find an index of an object by value, which of the following methods is going to be my best option performance-wise? Six year old 'answer': In an array of objects, fastest way to find the index of an object whose attributes

Reading a file line by line while storing an object in an array for each line

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问题 I have a text file with a maximum of 4 lines to read from. Each line has a mixture of strings and integers spaced out by tabs. I have successfully made my program read 1 line and store all the information in the appropriate spot, while also storing a new object in the array. The problem: I can't figure out how to get it to read multiple lines while also storing a new object in the array depending on the line read. Here is my method that takes the file and and stores an object in the array:

Inject Silex $app in my custom class

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问题 I'm on a Silex project and I use classes to different treatments: $connection = new Connection($app); $app->match('/connection', function () use ($app, $connection) { $connexion->connectMember(); return $app->redirect($app['url_generator']->generate('goHome')); })->method('GET|POST')->bind('doConnection'); In the function 'connectMember()' of my class 'Connection', I have : [...] if($isMember){ [...] }else{ return $this->_app['twig']->render( 'message.twig', array('msg' => "This member does

Polymer Clone Objects

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问题 How can we clone an object in Polymer? Example this.colorsAsc.push({color: 'red'}); this.colorsDesc = this.colorsAsc.reverse(); this.colorsDesc[0].color = 'blue'; // Both will be blue doing this I can do it in these many functionalities What is the most efficient way to deep clone an object in JavaScript? but I wonder if there is a way in Polymer to do that? Angular does it https://docs.angularjs.org/api/ng/function/angular.copy 回答1: You can try the following hack: this.colorsDesc = JSON

What is an object in Objective-C?

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问题 I thought I had a pretty good idea of what an object is.. but I was wrong. Could anyone explain what an object is? Or how I should think of it when programming? Please help me understand. I know it's not the pointer .. so what exactly is the object in a line of code .. 回答1: Conceptually in OOP, an object is a certain instance of a class. A class defines the information and actions for a certain type of object. The quintessential example is of a Car class, that maybe holds a "colour" property