Posts (page 191)
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8 min readHierarchical visualizations, such as treemaps and sunbursts, can be created in D3.js by following a few key steps. Firstly, you will need to define the hierarchical data structure that represents the relationships between different elements in your dataset. This can be done using D3's tree or cluster layouts.Next, you will need to use the data join method in D3 to bind the hierarchical data to DOM elements.
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6 min readTo replace a string in binary files using bash, you can use the sed command with the -i option. This option allows you to perform an in-place edit of the file. You can specify the search string and the replacement string as arguments to the sed command. For example, to replace the string "oldstring" with "newstring" in a binary file named "filename.bin", you can use the following command: sed -i 's/oldstring/newstring/g' filename.
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6 min readTo initialize an array in Kotlin Native with a generic type T, you can use the arrayOf function followed by the toCValues() extension function to convert the array elements to C values. Here's an example code snippet: // Define a generic class class ArrayWrapper<T>(val size: Int) { val array: Array<T> = arrayOfNulls<Any>(size) as Array<T> init { array.
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5 min readTo create custom shapes in D3.js, you can use the SVG path data to define your own shapes. This involves specifying a series of commands such as moveTo, lineTo, arcTo, etc. to create the desired shape. You can also use the d3.svg.symbol function to create predefined shapes like circles, squares, triangles, etc. Additionally, you can customize these shapes by specifying parameters such as size, rotation, fill color, stroke color, etc.
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3 min readTo compare folder sizes in bash/sh, you can use the du command to display the size of each folder in bytes. You can also use a combination of du and sort commands to list the folders in descending order of size. Another option is to use the awk command to sum up the sizes of all folders and then compare them using conditional statements. By using these commands and techniques, you can easily compare folder sizes in bash/sh and determine which folder is larger or smaller.
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6 min readIn Kotlin, you can load a public RSA key by reading the key from a file or a string representation and converting it into an instance of the PublicKey class. First, you need to create a KeyFactory object for RSA algorithm. Then, you can use this KeyFactory to generate the public key from the byte array or string representation of the key. Finally, you can use the generated public key for encryption or verification purposes.
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6 min readTo add legends to D3.js charts, you can use the legend() function provided by D3.js. This function allows you to create a legend for your chart by specifying the legend's position, style, and content. You can customize the legend's appearance by adjusting its font size, font color, background color, and other properties.To add a legend to your D3.js chart, you first need to create a SVG element for the legend and then use the legend() function to add the legend to the chart.
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4 min readOne way to exit a bash script if the C++ compiler finds an error is to check the compiler's return code after invoking it. By default, most compilers will return a non-zero value if there is an error during compilation. You can capture this return code using the special variable "$?" in bash and then use an "if" statement to exit the script if the return code is non-zero. Here is an example: g++ main.cpp -o main if [ $.
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5 min readTo call a session id from an activity to a fragment in Kotlin, you can pass the session id as an argument when you initialize the fragment. This can be done by creating a static method in the fragment class that takes the session id as a parameter and returns an instance of the fragment with the session id set as an argument. Then, in the activity, you can call this static method to create an instance of the fragment with the session id, and add it to the activity using the FragmentManager.
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7 min readCreating a responsive D3.js visualization involves using scalable vector graphics (SVG) elements that adjust in size and layout based on the dimensions of the container they are placed in. This can be achieved by setting the width and height of the SVG element to percentages rather than fixed values. Additionally, you can use media queries in CSS to apply styles based on the screen size, ensuring that your visualization looks good on both desktop and mobile devices.
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6 min readIn a bash script, you can split the elements of an array by using a for loop and referencing each element using the index. For example, if you have an array called "arr" with elements "1 2 3 4", you can split it like this: arr=(1 2 3 4) for i in "${arr[@]}" do echo "Element: $i" done This will output: Element: 1 Element: 2 Element: 3 Element: 4 You can also split the elements of an array based on a specific delimiter.
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2 min readTo reverse an ArrayList in Kotlin, you can simply use the reverse() function provided by the Kotlin standard library. This function will reverse the order of elements in the ArrayList.[rating:5c241908-e13b-494b-ac73-26ced6913ab0]How to reverse an ArrayList using Kotlin extensions?You can reverse an ArrayList using a Kotlin extension function like this: fun <T> ArrayList<T>.reverse() { val size = this.