Programming

How to Get the Current Date and Time in JavaScript

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JavaScript get current date/time

This article will show you how to get the current date, time, or both, in the JavaScript programming language. Code examples included. Date Objects in JavaScript Date objects represent a single point in time in JavaScript. They are created by initializing a new variable with a new Date object: var now = new Date(); By default, new Date objects are initialized to contain the date and time at the instant they were created, along with timezone details for the current device – thus representing the current … Read more

Promises in JavaScript: What they Are, How to Use Them

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JavaScript Promises

Promises are a feature of JavaScript which allow code to continue executing in the background, and perform an action with the result when it has completed. This article will show you how to use Promises. What is a ‘Promise’ in JavaScript? A Promise is an object in JavaScript which acts as a placeholder for the eventual result of an operation. A Promise is either: Pending while the operation completes Fulfilled when the operation is successful Rejected if the operation fails Promises allow for asynchronous code execution in JavaScript. … Read more

How to Rename or Move a File/Folder/Directory in Python

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Rename File or Folder/Directory in Python

This tutorial will explain how to rename or move a file or directory in the Python programming language and provide some simple examples you can follow. Looking to delete a file? Check out our tutorial on file/folder deletion in Python here. To Avoid Errors when Renaming, First Check if a File or Folder Exists To avoid errors when renaming or moving a file or folder, you should first check whether the path exists. The file which is to be moved or renamed must exist, and you … Read more

How to Delete a File/Folder/Directory in Python

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Delete a file or folder/directory in Python

This article will show you the various ways to delete files and directories in the Python programming language. To Avoid Errors, First Check if a File or Folder Exists To avoid errors when deleting a file, you can first check whether the file exists. You can also check whether Python is able to modify a directory. Deleting a File When a file has been confirmed to exist at a certain path, it can be deleted with the os.remove() function, which is part of the built-in Python os library which interacts … Read more

Formatting Numbers with the JavaScript toFixed()* Method [Examples]

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JavaScript toFixed()

This tutorial will show you how to format numbers to a fixed number of decimal places in the JavaScript programming language. JavaScript Number Variables JavaScript variables have different types. The type of a variable defines what kinds of values it can hold, and what can be done with that value. Number typed variables hold numeric values and include a number of methods (built in functions) for performing numeric operations. Number variables are declared by simply assigning a numeric value to a variable, or using the Number … Read more

Checking an Array Contains a Value in JavaScript [Examples]

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JavaScript in array includes

This article will show you how to check if a value is in an array in the JavaScript programming language. Code examples to check whether an array includes a value are provided. Arrays in JavaScript Arrays are a type of variable that hold an ordered list of values. Each value in an array has a position within the array, called the index. The index can be used to access each value in the array. Indexes are integer values, which start counting from 0 (zero) for the first … Read more

Beginners Guide to Floating Point Arithmetic Precision

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The Ultimate Beginners Guide to Floating Point Math/Arithmetic Precision Problems

This guide will explain the programming issues you will encounter when performing arithmetic with floating point numbers, and how to avoid them. The reason why these issues occur will be summarised and solutions will be provided. Floating point precision issues are common hurdle for beginner programmers – sometimes the result of what should be a simple mathematical operation comes out wrong, and little reason is given. Floating point precision issues are usually the cause, so here’s what they are and why this problem occurs. What … Read more

Using The Python decimal Class for Accurate Calculations

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Python decimal class

This guide will introduce you to the Python decimal library and class – Python tools which allow you to accurately work with decimal numbers without the rounding and accuracy issues which frequently arise when working with floating point numbers. Computers Can’t Perform Accurate Arithmetic With Decimal Numbers Decimal numbers are commonly stored as floating point number values. Computers are not particularly good at performing arithmetic with this type of numbers accurately. We break down why this is in our Ultimate Beginners Guide to Floating Point Math/Arithmetic Precision Problems. … Read more

The JavaScript toString() Method, Explained + Examples

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JavaScript toString()

One of the most common things you will want to do with a variable is to print a string representation of it. That’s what the toString() method is for. This article will explain when and how you can use it. Converting to Strings Data is displayed on your computer screen is most frequently displayed as text strings, regardless of how the data was stored. Numbers, arrays, boolean values, and objects, all have string representations that allow them to be viewed as text on screen, either for the … Read more

Using PHP sleep() and usleep() to Pause Execution [Examples]

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Pausing PHP with sleep and usleep

This short tutorial will show you how to use the PHP sleep() and usleep() functions to pause script execution for a number of seconds/microseconds, and provide some code examples. The PHP sleep() and usleep() functions both pause execution of the script, but both behave a bit differently. Why Pause/Sleep PHP Script Execution? Delaying, sleeping, or pausing PHP script execution is commonly used when scheduling an event. A call to the sleep() function might be placed at the end of a loop, so that after the code inside the loop has been run, a certain amount of time … Read more

Categories PHP