Posts (page 87)
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7 min readTo add an image to a rectangle in d3.js, you can follow these steps:Create a rectangle element using the rect() function in d3.js. Set the attributes such as coordinates (x, y), width, and height according to your requirements. For example: var svg = d3.select("svg"); var rect = svg.append("rect") .attr("x", 50) .attr("y", 50) .attr("width", 200) .attr("height", 100); Load the image using the image() function in d3.js.
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7 min readIn Ember.js, the bind-attr syntax is used to dynamically bind HTML attributes to properties in a component or template. It allows you to update the attribute value automatically when the bound property changes.To use bind-attr, you specify the attribute you want to bind, followed by = sign and the property name inside double curly braces. For example, {{bind-attr class=myClass}} will bind the class attribute to the value of myClass property.
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10 min readTo redraw data after zooming with d3.js, you can follow these steps:Store the initial state of the data before applying any zooming transformations.Add a zoom behavior to your d3.js visualization using d3.zoom().Define the zoom function that will be called when a zoom event occurs. Inside this function, you can modify the visual attributes of your data or redraw the entire visualization.Set the zoom behavior to listen for zoom events and call the zoom function when triggered.
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4 min readIn Ember.js, controller initialization refers to the process of setting up a controller with the necessary data and properties. There are several ways to initialize a controller in Ember.js, depending on your specific requirements and preferences.One common approach is to use the init() method provided by Ember.js. This method is called when the controller is first created, allowing you to perform any necessary initialization tasks.
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6 min readTo set an image as the background of a path in d3.js, you can follow these steps:First, make sure you have the image file you want to use. It could be in any supported format such as .jpg, .png, or .svg. In your JavaScript code, create a new SVG element using the .append() method on the main SVG container. Set the width and height of the SVG element according to your requirements. const svg = d3.select("body") .append("svg") .attr("width", 500) .
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8 min readTo test Ember.js routes, you can follow these steps:Start by creating a test file for your route. This can be done by using the ember-cli command-line tool, or by manually creating a new JavaScript file in the tests directory of your Ember.js project. Inside the test file, import the necessary modules for testing. Typically, you would import module, test, and any other dependencies needed for your testing setup. Create a test module using the module function.
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7 min readTo update a D3.js bar chart with new data, you can follow these steps:Select the chart container element: Start by selecting the container element in which the chart is rendered using D3.js. You can select it using CSS selector or by directly referencing the element using its ID or class. Define the updated data: Prepare the new data that you want to use to update the chart. This data should be in a format compatible with your chart implementation.
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10 min readUnit testing view bindings and templates in Ember.js involves verifying the behavior of the views, their bindings, and the correctness of the rendered templates. Here's a brief explanation of how to approach this process:Set up testing framework: Install the appropriate testing framework like QUnit or Mocha. Configure the testing framework with Ember.js if necessary. Create test files: Create a new test file specifically for view testing. Import the necessary dependencies, including Ember.
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6 min readTo compute the size of a polygon in SVG using d3.js, you can follow these steps:Create an SVG container: Start by creating an SVG container element using d3.js. This container will hold your polygon. const svg = d3.select("body").append("svg") .attr("width", width) .attr("height", height); Define the polygon attributes: Next, define the attributes of the polygon you want to compute the size of. This includes the points that make up the polygon.
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4 min readTo get the index item of an array in an Ember.js view, you can use the built-in {{each}} helper provided by Ember's templating system.Here's an example of how you can achieve this in an Ember.js view:In your view's template file, you can use the {{each}} helper to iterate over the array: {{#each model as |item index|}} <div>{{index}}: {{item}}</div> {{/each}} In this example, model is the array you want to loop over.
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9 min readUpdating an SVG path using d3.js is a common task when working with scalable vector graphics (SVG). Here is an overview of the steps involved:Select the SVG element: Use d3.js to select the SVG element that contains the path you want to update. This can be done using the d3.select() method, passing the appropriate selector. Bind data: Use the datum() or data() method to bind data to the SVG element. This data will determine the new path attributes.
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7 min readTo manipulate the DOM in the controller in Ember.js, you can follow these steps:Access the current Ember.js controller from the corresponding template. This can be done using the {{controller}} keyword. For example, {{controller.someProperty}}. Define an action in the controller that will be triggered on a specific event or user action. Actions are defined using the actions object in the controller.