Posts (page 88)
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5 min readTo access key values in an object using d3.js, you can follow these steps:Start by defining your object. For example, let's say you have an object called "data" with key-value pairs like this: var data = { key1: value1, key2: value2, key3: value3, // ... }; To access the values associated with specific keys, you can use the data[key] notation, where "key" is the name of the key you want to access. For example: var value1 = data.
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3 min readIn Ember.js, "controller.controllers" is a property that allows you to access all the controllers that are currently active within a particular scope. It returns an array-like object that contains references to each active controller.Controllers in Ember.js are used to manage the state and behavior of a specific part of your application's UI.
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8 min readDrawing a line graph using d3.js involves the following steps:Set up the HTML structure: Create a container element, typically a , where the graph will be displayed. Include the d3.js library: Add a script tag in the HTML file to import the d3.js library. Fetch or generate data: Retrieve the data from an external source like a CSV file or generate it programmatically. Define the graph dimensions: Specify the width and height of the graph area within the container element.
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5 min readIn Ember.js, to get an element by its id using jQuery, you can use the Ember.$ function which is a wrapper around jQuery.To get an element by id, you can use the Ember.$('#elementId') syntax. This will return the jQuery object representing the element with the specified id.For example, if you have an element with the id "myElement" in your Ember.js template, you can access it using the following code: let element = Ember.
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5 min readTo use the enter() method correctly in D3.js, follow the steps mentioned below:Select the desired elements from the DOM that you want to bind data to using the selectAll() method. For example, you can select all elements. Use the data() method to bind data to the selected elements. Pass an array of data as an argument to this method. Each element in the data array will be associated with a corresponding DOM element. Chain the enter() method to the selected elements.
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6 min readTo query a JSON file in Ember.js, you can follow these steps:Start by defining a model in your application. This model will represent the structure of the JSON data you want to query. You can do this by creating a new file, typically in the app/models directory, and using the Ember Data DS.Model class. For example: // app/models/my-model.js import DS from 'ember-data'; export default DS.Model.extend({ // Define properties of your model based on the JSON structure name: DS.
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4 min readTo run a function after another is done in d3.js, you can utilize the concept of callbacks or promises.Callbacks:Define the initial function that you want to run.Inside this function, specify the callback function that you want to execute after the first function is completed.Once the first function is done, call the callback function.Example: function firstFunction(callback) { // code for the first function // ...
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5 min readIn Ember.js, you can get input values using the value attribute or the Ember Data model property.To get the input value using the value attribute, you need to bind the input to a property in your component or controller. You can do this by using the {{input}} helper like this: {{input value=myProperty}} In the above example, the myProperty is a property in your component or controller that will store the input value. You can access this value in your JavaScript through this.myProperty.
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5 min readTo change the color of a path in d3.js, you can modify the "stroke" or "fill" attributes of the path element.Select the path element you want to change the color of. For example, you can use the d3.js select() method to select the path element by its ID or class: var path = d3.select("#pathId"); To change the stroke color of the path, use the style() method and set the "stroke" property to the desired color: path.
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6 min readWhen transitioning from an Ember.js controller that handles routing, there are a few important steps to follow:Import Dependencies: Begin by importing the necessary dependencies for your transition. This includes importing the Ember.js router and any other custom or third-party libraries. Get Router Instance: Retrieve the instance of the Ember.js router that handles the routing in your application. You can access this instance by using the getOwner method provided by the Ember.js framework.
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4 min readTo create a definition list using d3.js (Data-Driven Documents), you need to follow these steps:Start by creating an HTML element to contain your definition list. For example, you can create a element: <dl id="definition-list"></dl> In your JavaScript code, select the definition list element using d3.js: const definitionList = d3.select("#definition-list"); Prepare your data as an array of objects, where each object represents a term and its corresponding definition.
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8 min readIn Ember.js, you can use multiple router objects to manage different sections or features of your application. Each router object represents a specific area or functionality of your application. Here's how you can use multiple router objects in Ember.js:Define multiple router objects: Instead of having a single router file, you can create multiple router objects in separate files.