Jeremy  Reilly

Jeremy Reilly

1611046260

Vector Boolean Operations with HTML5 Canvas

In this post, I will look at how to handle vector graphics boolean operations such as union, difference, intersection or xor, in the HTML5 Canvas. The boolean operations are very common and useful for any designer. If you regularly use Adobe Illustrator to create graphic elements, you must be familiar with the Pathfinder panel that lets you use these operations.

Why vector boolean ops?

Let’s say you want to get an intersection of two shapes. One way to think about it is from the perspective of bitmap images. You can access individual pixels and create an image mask or use one of the many blend modes (ie. multiply, difference, etc.) This approach certainly works if you mainly work with images, but if your graphics are vector-based, then, handling the intersection with boolean operations, not pixels, will give you back newly created vector shapes, which you can further edit by manipulating individual points or adding a stroke, for example.

Using g.js

It will be fairly complex to implement by ourselves, so I decided to use a library called g.js. It is a JavaScript graphics library from the Nodebox team, and its simple methods make it very easy to do complex vector graphics operations. I will first show you how to use g.js to create paths and also how to combine the library with another canvas-based library p5.js at the end.

#html5 #javascript #html #web-development

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Vector Boolean Operations with HTML5 Canvas
Ray  Patel

Ray Patel

1619565060

Ternary operator in Python?

  1. Ternary Operator in Python

What is a ternary operator: The ternary operator is a conditional expression that means this is a comparison operator and results come on a true or false condition and it is the shortest way to writing an if-else statement. It is a condition in a single line replacing the multiline if-else code.

syntax : condition ? value_if_true : value_if_false

condition: A boolean expression evaluates true or false

value_if_true: a value to be assigned if the expression is evaluated to true.

value_if_false: A value to be assigned if the expression is evaluated to false.

How to use ternary operator in python here are some examples of Python ternary operator if-else.

Brief description of examples we have to take two variables a and b. The value of a is 10 and b is 20. find the minimum number using a ternary operator with one line of code. ( **min = a if a < b else b ) **. if a less than b then print a otherwise print b and second examples are the same as first and the third example is check number is even or odd.

#python #python ternary operator #ternary operator #ternary operator in if-else #ternary operator in python #ternary operator with dict #ternary operator with lambda

Jeremy  Reilly

Jeremy Reilly

1611046260

Vector Boolean Operations with HTML5 Canvas

In this post, I will look at how to handle vector graphics boolean operations such as union, difference, intersection or xor, in the HTML5 Canvas. The boolean operations are very common and useful for any designer. If you regularly use Adobe Illustrator to create graphic elements, you must be familiar with the Pathfinder panel that lets you use these operations.

Why vector boolean ops?

Let’s say you want to get an intersection of two shapes. One way to think about it is from the perspective of bitmap images. You can access individual pixels and create an image mask or use one of the many blend modes (ie. multiply, difference, etc.) This approach certainly works if you mainly work with images, but if your graphics are vector-based, then, handling the intersection with boolean operations, not pixels, will give you back newly created vector shapes, which you can further edit by manipulating individual points or adding a stroke, for example.

Using g.js

It will be fairly complex to implement by ourselves, so I decided to use a library called g.js. It is a JavaScript graphics library from the Nodebox team, and its simple methods make it very easy to do complex vector graphics operations. I will first show you how to use g.js to create paths and also how to combine the library with another canvas-based library p5.js at the end.

#html5 #javascript #html #web-development

Tamia  Walter

Tamia Walter

1611300827

Vector Boolean Operations with HTML5 Canvas

Adobe Illustrator’s Pathfinder, but with JavaScript

In this post, I will look at how to handle vector graphics boolean operations such as union, difference, intersection or xor, in the HTML5 Canvas. The boolean operations are very common and useful for any designer. If you regularly use Adobe Illustrator to create graphic elements, you must be familiar with the Pathfinder panel that lets you use these operations.

Why Vector Boolean Ops?

Let’s say you want to get an intersection of two shapes. One way to think about it is from the perspective of bitmap images. You can access individual pixels and create an image mask or use one of the many blend modes (ie. multiply, difference, etc.) This approach certainly works if you mainly work with images, but if your graphics are vector-based, then, handling the intersection with boolean operations, not pixels, will give you back newly created vector shapes, which you can further edit by manipulating individual points or adding a stroke, for example.

#programming #javascript #web-development #html5 #html

Abdullah  Kozey

Abdullah Kozey

1617738420

Unformatted input/output operations In C++

In this article, we will discuss the unformatted Input/Output operations In C++. Using objects cin and cout for the input and the output of data of various types is possible because of overloading of operator >> and << to recognize all the basic C++ types. The operator >> is overloaded in the istream class and operator << is overloaded in the ostream class.

The general format for reading data from the keyboard:

cin >> var1 >> var2 >> …. >> var_n;

  • Here, var1var2, ……, varn are the variable names that are declared already.
  • The input data must be separated by white space characters and the data type of user input must be similar to the data types of the variables which are declared in the program.
  • The operator >> reads the data character by character and assigns it to the indicated location.
  • Reading of variables terminates when white space occurs or character type occurs that does not match the destination type.

#c++ #c++ programs #c++-operator overloading #cpp-input-output #cpp-operator #cpp-operator-overloading #operators

Kasey  Turcotte

Kasey Turcotte

1623233520

Efficient Pandas: Apply vs Vectorized Operations

Time and efficiency matters

Pandas is one of the most commonly used data analysis and manipulation libraries in data science ecosystem. It offers plenty of functions and methods to perform efficient operations.

What I like most about Pandas is that there are almost always multiple ways to accomplish a given task. However, we should consider time and computational complexity when selection a method from available options.

It is not enough just to complete a given task. We should make it as efficient as possible. Thus, having a comprehensive understanding of how functions and methods work is of crucial importance.

In this article, we will do examples to compare the apply and applymap functions of pandas to vectorized operations. The apply and applymap functions come in hand for many tasks. However, as the size of data increases, time becomes an issue.

#programming #data-science #machine-learning #artificial-intelligence #efficient pandas: apply vs vectorized operations #apply vs vectorized operations