Using nullability in GraphQL

When you’re working with a REST API, you don’t always know exactly what fields you’re going to get back when you call an endpoint. GraphQL improves on that by having a complete schema of your available data, and giving you back exactly the fields you asked for.

Working With NULL Values in SQL

The NULL value is a data type that represents an unknown value. We consider how NULL is used in creating tables, querying, string operations, and functions. Surely you will have a completely different view after reading our article.

On simplifying null validation with C# 9

In my last post, I took a test drive through some C# 9 features that might make your developer life easier. In it, I mentioned using logical patterns, such as the not keyword to throw an ArgumentException, if wanted:

How To Check Array Is Empty Or Null In Javascript

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Everything about null in JavaScript

In this post, you’ll learn everything about null in JavaScript: its meaning, how to detect it, the difference between null and undefined, and why using null extensively creates code maintenance difficulties.

What are the Best ways to Handle Null in TypeScript? - DasJs

Handle null is a biggest nightmare for any developers. In this article we are discussing two best way to handle null in Typescript.

null and ES2020: Optional Chaining and Null Coalescing

When Javascript developers think of ECMA, they reference the changes made in 2015 that improved syntax and added new features to the language. However, ECMA still updates the language! And earlier this year, they released ES11, with two of my new favorite tools: Optional Chaining and Null Coalescing!

The Non-Value Trio of JavaScript

Undefined, Null, and NaN are 3 keywords, known as non-values or empty values, that are often a source of buggy code, stress, and confusion for many beginning JavaScript engineers. Here, we will attempt to give this trio its proper due and uncover its mysteries.

How To Check Variable Is NULL in PHP | PHP is_null() Tutorial Example

How To Check Variable Is NULL in PHP | PHP is_null() Tutorial Example. PHP is_null() function finds whether a variable is NULL. Returns True if null.

Statistics Tutorial 6 : Null Hypothesis Testing

After my last tutorial on Statistics people were asking for a more detailed tutorial. So this series will cover not only the topics in more depth, but it will also include all the Python code used to make all the Statistics formulas. By the end you'll have a huge Python Statistics module you can use to do amazing things!

JavaScript Null Check: How to Check Null using

To check what is the data type of variable in JavaScript, use the typeof operator. The typeof is a unary operator returns a string indicating the type of the unevaluated operand. The null value describes the intended absence of object value. To check the typeof null, use the following code.

ionicでビルド時に「Crashlytics found an invalid API key: null」というエラーが発生する|teratail

ionicを勉強しているものです。ionicでFirebaseと連携してサインインとサインアップができるアプリケーションを実装しています。端末で動作確認するためにビルドを行おうとしたのですが、以下のエラーにはまってしまいました。 このエラーについて調べてみたのですが、ionicでこのエラーが発生し

Visualizing the Nothing

How to visualize the incompleteness of a dataset with Python. In this article, we’ll explore how to visualize all the NULLs in our datasets and get a look at what insights we can extract from doing so.

Null Keyword in Java (Tutorial)

Null Keyword in Java (Tutorial). Now if you try to use a method on "a", you will get a null pointer exception. You can't make a primitive type null.

C# 9: シンプルになったパラメータnullバリデーション

シンプルになったパラメータnullバリデーションがC# 9の機能として取り入れられることになった。最小化されたこの機能では、非nullパラメータの検証に必要なコードが、関数シグネチャ内の1文字にまで削減されている。

C# 6.0 Null Propagation Operators ?. and ?[]

C# 6.0 introduced two new null-propagation operators: ?. and ?[]. They will make null reference check much easier.

JavaScript's Null Coalescing Operator

This year ECMAScript 2020 (ES2020) will be released! Since ECMAScript 2015 (ES6) was released in 2015, we have gotten yearly updates to the JavaScript language.