All Null Solutions on Gang of Coders

Total of 296 Null Solutions

Avoiding NullPointerException in Java

Java Nullpointerexception Null

Altering a column: null to not null

Sql Server Tsql Null Alter Table Alter Column

'\0' evaluates false, "\0" evaluates true

C Arrays String Null Kernighan and-Ritchie

NULL pointer with boost::shared_ptr?

C++Boost Null Pointers Shared Ptr

Checking an input param if not Null and using it in where in SQL Server

Sql Server Sql Server-2008 Null Where Clause Coalesce

Assigning NULL to a list element in R?

Is this the proper way to initialize null references in Scala?

Checking for a null int value from a Java ResultSet

Java Null Resultset

How to detect if NSString is null?

Objective C Null Nsnull

Spark sql how to explode without losing null values

Java Apache Spark Null Apache Spark-Sql

Can '\0' and NULL be used interchangeably?

Create unique constraint with null columns

Sql Postgresql Database Design Null Referential Integrity

How to select rows with one or more nulls from a pandas DataFrame without listing columns explicitly?

Python Pandas Null Nan

DateTime "null" value

C#Datetime Null

PHP is_null() and ==null

Check if a parameter is null or empty in a stored procedure

Sql Sql Server-2008 Stored Procedures Parameters Null

Why do seemingly empty files and strings produce md5sums?

String Null Md5sum

MySQL: selecting rows where a column is null

how to add nil to nsmutablearray?

Iphone Objective C Nsmutablearray Null

Java: avoid checking for null in nested classes (Deep Null checking)

Java Class Null Ternary

Don't update column if update value is null

Sql Postgresql Null Sql Update

Arrays with NULL keys

Php Arrays Null

Why (null == false) and (null == true) both return false?

Javascript Null Boolean

Is there any reason to check for a NULL pointer before deleting?

C++Pointers Null Delete Operator

Why static fields are not initialized in time?

Java Static Null Nullpointerexception

Is it possible to set an object to null?

C++Object Null Is Empty Stdoptional

Throwing ArgumentNullException in constructor?

C#Exception Constructor Null Arguments

C#: should object variables be assigned to null?

C#Garbage Collection Null

How do :default => 0 and :null => false differ for integer fields in migrations?

Ruby on-Rails Null Migration Default

What is the PostgreSQL equivalent for ISNULL()

Sql Server Postgresql Null

How to check if String is null

Why can't primitive data types be "null" in Java?

Java Null Primitive Types

Why use Optional.of over Optional.ofNullable?

Java Java 8 Nullpointerexception Null Optional

What's the difference between undefined in Haskell and null in Java?

Java Haskell Types Null Maybe

How to insert 'NULL' values into PostgreSQL database using Python?

Python Postgresql Null Psycopg2 Nonetype

MySQL comparison with null value

Mysql Sql Null Isnull

What header defines NULL in C++?

getActionView() of my MenuItem return null

Android View Null Android Actionbar

Django model: NULLable field

Django Postgresql Model Null

Rails checking if a record exists in database

Ruby on-Rails Database Null

What is the difference between "(Object)null" and "null" in Java?

Java Null Nullpointerexception

How to check a Long for null in java

Java Null Long Integer

Accessing class members on a NULL pointer

C++Null Virtual Null Pointer

PHP constructor to return a NULL

Php Constructor Error Handling Null

JavaScript check if value is only undefined, null or false

Javascript Null Undefined

Understanding the difference between null and '\u000' in Java

How to avoid checking for null values in method chaining?

Java Exception Nullpointerexception Null

How to show if a method may return null

Java Null Design by-Contract

When to use NULL in MySQL tables

NULL vs nullptr (Why was it replaced?)

C++Pointers Null Nullptr

What's the difference between [NSNull null] and nil?

Objective C Cocoa Touch Cocoa Null Nsnull

How come invoking a (static) method on a null reference doesn't throw NullPointerException?

Java Static Null Nullpointerexception

How to deal with (maybe) null values in a PreparedStatement?

Java Null Prepared Statement

Difference between null and empty string

Java String Null Nullpointerexception

NULL values inside NOT IN clause

Sql Sql Server Tsql Null Notin

Which @NotNull Java annotation should I use?

Java Nullpointerexception Null Annotations Ide

Checking if an object is null in C#

C#Null Nullreferenceexception

What is null in Java?

Java Null Terminology

Best way to check for "empty or null value"

Sql Database Postgresql Null Coalesce

TypeScript filter out nulls from an array

Typescript Null

What is the `zero` value for time.Time in Go?

Best explanation for languages without null

Programming Languages Functional Programming Null Nullpointerexception Non Nullable

Why does Oracle 9i treat an empty string as NULL?

Sql Oracle Null String

php is null when empty?

Filter values only if not null using lambda in Java8

Java Lambda Nullpointerexception Null Java 8

Select rows which are not present in other table

Sql Postgresql Null Left Join Exists

How to set enum to null

C#Enums Null Nullable

MySQL CONCAT returns NULL if any field contain NULL

Mysql Sql Null Concat

Why is null an object and what's the difference between null and undefined?

Javascript Object Null Undefined Typeof

getActivity() returns null in Fragment function

Android Android Fragments Android Activity Null Android Context

Do you use NULL or 0 (zero) for pointers in C++?

How can I check for an empty/undefined/null string in JavaScript?

Javascript Null Is Empty

nil detection in Go

Origin null is not allowed by Access-Control-Allow-Origin

Javascript Null Xmlhttprequest Cors Localhost

Setting Objects to Null/Nothing after use in .NET

C#.Net vb.net Memory Management Null

Can I use if (pointer) instead of if (pointer != NULL)?

C++Pointers If Statement Null Null Pointer

NULL vs nil in Objective-C

Objective C Cocoa Null

How to check if my string is equal to null?

Java String Null Equals Conditional Operator

Checking for NULL pointer in C/C++

C++C If Statement Null Coding Style

How to simplify a null-safe compareTo() implementation?

Java Refactoring Comparison Null Compareto

Cleaner way to do a null check in C#?

C#.Net 4.0 Null .Net 4.5

JavaScript null check

Javascript Null Undefined Null Check

How to check null objects in jQuery

Javascript Jquery Dom Object Null

What is the correct way to represent null XML elements?

Xml Null Xml Nil

How do I check for null values in JavaScript?

Javascript Null Compare Comparison Equality

Difference between null and empty ("") Java String

Java String Null Equals Referenceequals

When should I use nil and NULL in Objective-C?

Objective C Null Nsnull

Is it good practice to NULL a pointer after deleting it?

C++Pointers Null Dynamic Allocation

How to use NULL or empty string in SQL

Sql Sql Server Null Where

How do I get SUM function in MySQL to return '0' if no values are found?

Mysql Function Null Sum

Unique ways to use the null coalescing operator

C#Coding Style Null Conditional Operator Null Coalescing-Operator

What are the advantages of using nullptr?

C++C++11 Null C++ Faq Nullptr

Why does NULL = NULL evaluate to false in SQL server

Sql Sql Server Null

In Objective-C why should I check if self = [super init] is not nil?

Objective C Null Init

How to tell if a string is not defined in a Bash shell script

Bash Shell Scripting String Null

Why `null >= 0 && null <= 0` but not `null == 0`?

Javascript Null Comparison Equality

String.IsNullOrWhiteSpace in LINQ Expression

C#Linq Lambda Null Linq to-Entities

Why is my Spring @Autowired field null?

Java Spring Null Nullpointerexception Autowired

What's the better (cleaner) way to ignore output in PowerShell?

Powershell Null Void Io Redirection

Use of Boolean? in if expression

SQL is null and = null

Null vs. False vs. 0 in PHP

Method Overloading for null argument

Java Oop Null Overloading

Overriding == operator. How to compare to null?

C#.Net Null Overloading Operator Keyword

Is there a standard function to check for null, undefined, or blank variables in JavaScript?

Javascript Null Comparison Undefined

PHP json_decode() returns NULL with valid JSON?

Does free(ptr) where ptr is NULL corrupt memory?

C Pointers Memory Management Null Free

What reason is there to use null instead of undefined in JavaScript?

Javascript Null Undefined

Java null check why use == instead of .equals()

Is returning null bad design?

Oop Null Return Value

ALTER TABLE, set null in not null column, PostgreSQL 9.1

Postgresql Null Postgresql 9.1

Is it better to return `undefined` or `null` from a javascript function?

Javascript Function Null Return Undefined

Deep null checking, is there a better way?

Why does String.valueOf(null) throw a NullPointerException?

Java Null Nullpointerexception Overloading Api Design

Is null reference possible?

C++Reference Null Language Lawyer

Why is it Valid to Concatenate Null Strings but not to Call "null.ToString()"?

C#.Net String Null

How to resolve TypeError: Cannot convert undefined or null to object

Javascript Null Undefined

How to remove all the null elements inside a generic list in one go?

C#List Null Element

How much size "Null" value takes in SQL Server

Sql Server Tsql Sql Server-2005 Null

JavaScript checking for null vs. undefined and difference between == and ===

Javascript Null Undefined

error: ‘NULL’ was not declared in this scope

C++Gcc Pointers Null

Is null an Object?

Method call if not null in C#

Why is there a `null` value in JavaScript?

Javascript Null Language Features Undefined

How to check for an undefined or null variable in JavaScript?

Javascript Null Undefined

Check for null in foreach loop

C#Loops Foreach Null

Unable to cast object of type 'System.DBNull' to type 'System.String`

C#asp.net Database Null

MongoDB: How to query for records where field is null or not set?

Mongodb Null Mongodb Query Exists

Mongo: find items that don't have a certain field

Mongodb Null Exists

What is the proper way to check for null values?

C#.Net Session Null Null Coalescing-Operator

Null check chain vs catching NullPointerException

Java Exception Nullpointerexception Null Custom Error-Handling

Error:null value in entry: incrementalFolder=null

Redefining NULL

How can I determine if a variable is 'undefined' or 'null'?

Javascript Jquery Variables Null Undefined

Why does this string extension method not throw an exception?

C#Null Comparison Ienumerable Argumentnullexception

json_encode is returning NULL?

When is null or undefined used in JavaScript?

Javascript Null Undefined

IllegalArgumentException or NullPointerException for a null parameter?

Java Exception Null Nullpointerexception Illegalargumentexception

How to do ToString for a possibly null object?

C#.Net String Object Null

Sort NULL values to the end of a table

Sql Postgresql Null Sql Order-By

Representing null in JSON

Json Null Jackson Gson

How to filter empty or NULL names in a QuerySet?

Django Django Models Django Queryset Filter Null

IBOutlet is nil, but it is connected in storyboard, Swift

Xcode Swift Uistoryboard Null Iboutlet

Check if DataRow exists by column name in c#?

Why is there a difference in checking null against a value in VB.NET and C#?

C#vb.net .Net 4.0 Null

How is null + true a string?

C#.Net String Null Types

Avoid division by zero in PostgreSQL

Sql Postgresql Null Aggregate Functions Divide by-Zero

Should a retrieval method return 'null' or throw an exception when it can't produce the return value?

Java Exception Error Handling Null

Why I am getting Cannot pass parameter 2 by reference error when I am using bindParam with a constant value?

Php Mysql Pdo Null Sql Insert

Does std::string have a null terminator?

What is a 'NoneType' object?

Python Null Nonetype

Mark parameters as NOT nullable in C#/.NET?

C#.Net Parameters Null

IN Clause with NULL or IS NULL

Sql Postgresql Null Conditional Statements In Clause

object==null or null==object?

How can I check if a string is null or empty in PowerShell?

.Net String Powershell Null

Identifying and removing null characters in UNIX

Unix Shell Null Special Characters

Why does Map.of not allow null keys and values?

Java Dictionary Null Hashmap Java 9

Calling Java varargs method with single null argument?

Null Language Design Java Variadic Functions

Removing "NUL" characters

Null Char Notepad++

Checking for an empty field with MySQL

Php Sql Mysql Null

Is there a Java standard "both null or equal" static method?

Java Null Equals

Shortest way to check for null and assign another value if not

C#.Net Null Variable Assignment

MySQL and PHP - insert NULL rather than empty string

Php Mysql Null Sql Insert

Using Thymeleaf when the value is null

Html Null Thymeleaf

How to check a string against null in java?

Java String Null

Check if value isset and null

Java "?" Operator for checking null - What is it? (Not Ternary!)

Java Syntax Null

return, return None, and no return at all?

Python Null Return

How do I test for an empty string in a Bash case statement?

String Bash Null Case

What is the difference between null and System.DBNull.Value?

Sort by column ASC, but NULL values first?

Sql Postgresql Null Sql Order-By

Uninitialized Object vs Object Initialized to NULL

Java Null Initialization

How do you construct a std::string with an embedded null?

C++Null Stdstring

What is the difference between Nullable<T>.HasValue or Nullable<T> != null?

C#.Net Null Nullable

Best way to check if a Data Table has a null value in it

C#.Net Validation Datatable Null

Is it still safe to delete nullptr in c++0x?

C++Null Language Lawyer Delete Operator

Nullable types: better way to check for null or zero in c#

Testing pointers for validity (C/C++)

C++C Validation Pointers Null

Rails: Order with nulls last

Ruby on-Rails Ruby on-Rails-3 Sorting Activerecord Null

How should we manage jdk8 stream for null values

Java Null Java 8 Java Stream

Is there a Ruby, or Ruby-ism for not_nil? opposite of nil? method?

Ruby on-Rails Ruby Null

Best way to check if an PowerShell Object exist?

Powershell Object Null Powershell 2.0

Should JSON include null values

Javascript Json Null Undefined

Difference between NULL and null in PHP

What is the difference between "x is null" and "x == null"?

C#.Net Null Pattern Matching C# 7.0

null vs empty string in Oracle

Oracle Null Oracle10g String

SQL Server String Concatenation with Null

Sql Server Null String Concatenation Calculated Columns

What is the use of adding a null key or value to a HashMap in Java?

Java Null Hashmap Key

switch with var/null strange behavior

C#Null Switch Statement Var C# 7.0

Null parameter checking in C#

C#Function Null

Best way to check for null values in Java?

Java Null Nullpointerexception

C# code won't compile. No implicit conversion between null and int

C#String Null Nullable

Should the hash code of null always be zero, in .NET

C#.Net Hash Null

JavaScript String concatenation behavior with null or undefined values

Javascript Null Undefined String Concatenation

Check if returned value is not null and if so assign it, in one line, with one method call

Java Syntax Null Variable Assignment Method Call

What is a NullReferenceException, and how do I fix it?

C#.Net vb.net Null Nullreferenceexception

Does assigning objects to null in Java impact garbage collection?

Java Null Garbage Collection

C# okay with comparing value types to null

string.Empty vs null.Which one do you use?

C#.Net Null String

How to specify null value as filter in a Doctrine query?

Php Null Doctrine Dql

MySql Query Replace NULL with Empty String in Select

Mysql String Replace Null

Best ruby idiom for "nil or zero"

Ruby Design Patterns Idioms Null

NULL in MySQL (Performance & Storage)

What is the point of the class Option[T]?

Java Scala Null Functional Programming Monads

Why can't I check if a 'DateTime' is 'Nothing'?

vb.net Datetime Null Nullable Nothing

C# HasValue vs !=null

Why null cast a parameter?

Java constructor style: check parameters aren't null

Java Constructor Null Coding Style

How to set null value to int in c#?

C#.Net Null Int Nullable

How to check if an array is empty in Postgres

Sql Arrays Postgresql Stored Procedures Null

Replace null with 0 in MySQL

Why do I get null instead of empty string when receiving POST request in from Razor View?

asp.net Mvc String Razor Null Viewmodel

What does exclamation mark mean before invoking a method in C# 8.0?

C#Null Nullable C# 8.0

Undefined or null for AngularJS

Angularjs Null Undefined

Are nulls in a relational database okay?

Database Design Oop Null

Capturing output of find . -print0 into a bash array

Arrays Bash Null Find Delimiter

Why are NULL pointers defined differently in C and C++?

C++C Pointers Null

How to add nil value to Swift Dictionary?

Swift Dictionary Null Optional

Error if don't check if {{object.field}} exists

Variables Properties Null Angular

Can I use NULL as substitution for the value of 0?

C++C Pointers Null Language Lawyer

Is NULL always false?

C Null Pointers

Delete a file named "NUL" on Windows

C Windows Null Cygwin

Why is "null" present in C# and Java?

Check if KeyValuePair exists with LINQ's FirstOrDefault

How to select rows where column value IS NOT NULL using CodeIgniter's ActiveRecord?

Php Mysql Codeigniter Activerecord Null

Is it a bad idea if equals(null) throws NullPointerException instead?

Java Null Equals Nullpointerexception

Can constructor return a null object?

Java Constructor Null

HashMaps and Null values?

Java Null Hashmap Hashcode

how do you insert null values into sql server

Sql Sql Server Null

Standard use of 'Z' instead of NULL to represent missing data?

Sql Database Design Null Standards Rdbms

SQL query, if value is null then return 1

Difference between nil, NIL and, null in Objective-C

Objective C Null Nsnull

Java map.get(key) - automatically do put(key) and return if key doesn't exist?

Java Dictionary Get Null Put

NULL value in multi-column primary key

Mysql Null Composite Primary-Key

Doctrine 2 OneToMany Cascade SET NULL

Doctrine Null Set One to-Many

MySQL: get MAX or GREATEST of several columns, but with NULL fields

What's the point of Guava checkNotNull

Java Null Guava Preconditions

Pandas - check if ALL values are NaN in Series

Python Pandas Null Nan Series

Null check in VB

vb.net Null Runtime Error

Why does .ToString() on a null string cause a null error, when .ToString() works fine on a nullable int with null value?

C#String Null Int Nullable

How to check multiple objects for nullity?

Java Null Nullable

In C#, what happens when you call an extension method on a null object?

C#Parameters Null Extension Methods

Does MySQL index NULL values?

Mysql Indexing Null

Best way to check if a character array is empty

C Arrays Null Char

Portably safe to pass NULL/zero to dynamic_cast?

C++Null Dynamic Cast

Any simple way to test null before convert an object to string

javax.persistence.NoResultException: No entity found for query

Java Hibernate Jpa Exception Handling Null

Define a variable and set it to a default value if something goes wrong during definition

Variables Gradle Null Default Value

remove null or undefined from properties of a type

Typescript Types Null Undefined

obj.nil? vs. obj == nil

Ruby Null Comparison

Prevent unlist to drop NULL values

Null safe Collection as Stream in Java 8

Java Collections Null Java 8 Java Stream

Is null check needed before calling instanceof?

Java Nullpointerexception Null

Updating integer column with null values in postgres

Postgresql Null Sql Update Alter

How do I return my records grouped by NULL and NOT NULL?

Sql Null Group By

ListView getChildAt returning null for visible children

Android Listview Null

What is the difference between NULL, '\0' and 0?

C Pointers Null

Using COALESCE to handle NULL values in PostgreSQL

Sql Database Postgresql Null Coalesce

How can I change NULL to 0 when getting a single value from a SQL function?

Sql Tsql Null Sum

Check chains of "get" calls for null

Java Null Nullpointerexception

Is there a null std::ostream implementation in C++ or libraries?

C++Null Ostream

Is NULL always zero in C?

C Pointers Null Zero

Check if AJAX response data is empty/blank/null/undefined/0

Javascript Jquery Ajax Null

Is Objects.requireNonNull less efficient than the old way?

Java Performance Null

What does i:nil="true" mean?

Xml Null Xml Nil

PHP considers null is equal to zero

How to create variable argument methods in Objective-C

Objective C Xcode Format Variadic Functions Null

getElementById() returns null even though the element exists

Javascript Html Null Getelementbyid

What is the PHP syntax to check "is not null" or an empty string?

Php Variables Null Conditional Statements

MySQL foreign key to allow NULL?

Mysql Database Null Foreign Keys Referential Integrity

Check if object exists in JavaScript

Javascript Debugging Variables Null Undefined

How will a C# switch statement's default label handle a nullable enum?

C#Null Switch Statement Nullable

Allow null in unique column

Sql Postgresql Database Design Null Unique Constraint

Handling null values in protobuffers

Java Null Protocol Buffers

HQL "is null" And "!= null" on an Oracle column

Oracle Hibernate Null

How to test for $null array in PowerShell

Powershell Null

Postgresql turn null into zero

Sql Postgresql Null Max

What is the difference between null and undefined in JavaScript?

Javascript Null Undefined

Referring to the null object in Python

Python Python 3.x Object Null Interpreted Language

Check if a string is null or empty in XSLT

Xslt Null Xslt 1.0 Xslt 2.0

static variable null when returning to the app

Android Android Activity Static Null

PostgreSQL: Create an index to quickly distinguish NULL from non-NULL values

Sql Postgresql Indexing Null

Not equal <> != operator on NULL

Sql Sql Server Tsql Null

Checking if this is null

C++Pointers Null

Hibernate: How to set NULL query-parameter value with HQL?

Java Hibernate Null

How can a not null constraint be dropped?

Mysql Null Constraints

How to convert empty spaces into null values, using SQL Server?

Sql Server Null Is Empty

IllegalArgumentException: Parameter specified as non-null is null

Android Exception Null Kotlin

Unique key with NULLs

Mysql Database Null Relational Model

Ruby check if nil before calling method

How to check for null in a single statement in scala?

Scala Null Inline

How can I check if 'grep' doesn't have any output?

Bash If Statement Null Grep

Hiding nil values, understanding why Go fails here

Pointers Go Interface Null

How to replace all Null values of a dataframe in Pyspark

Dataframe Null Pyspark

how to check if a datareader is null or empty

C#Null Sqldatareader

How to select an empty result set?

Sql Mysql Stored Procedures Null Resultset