Tag: NULL
MySQL SELECT WHERE NULL
In this article, we will be discussing MySQL SELECT WHERE statement when column value is NULL. While working with strings, we mostly think that NULL is the same as an empty string(‘ ‘), but that is not a valid statement to make. In MySQL, NULL’s concept is different. When NULL is compared to any value, …
Javascript Check If an Object Is Null or Undefined
While working in javascript, often we encounter a requirement that is to determine if the object is null or not. We might require this check to verify that the object is not null when the objects are loaded dynamically. If the value of the object is not null or not undefined, only then perform operations …
Select Rows where a column is null in Pandas
This tutorial will discuss about different ways to select DataFrame rows where a column is null in pandas. Table Of Contents Preparing DataSet Select DataFrame Rows where a column has Nan or None value Summary Preparing DataSet Let’s create a DataFrame with some hardcoded data. Advertisements import pandas as pd import numpy as np data …
Check if a Char Array is Null Terminated in C++
This tutorial will discuss about unique ways to check if a char array is null terminated. Table Of Contents Technique 1: Using STL Algorithm any_of() Technique 2: Check if char array is null terminated Summary Technique 1: Using STL Algorithm any_of() To check if a char array has any ‘’ character or not, we can …
Check if All elements in Array are null in PHP
This tutorial will discuss about a unique way to check if all elements in array are null. We can use the array_reduce() function to get the work done here. The array_reduce() function accepts three arguments, Advertisements An array A callback function. A boolean value. It will be returned if the array is empty. It then …
Check if Any element in Array is NULL in C++
This tutorial will discuss about a unique way to check if any element in array is null in C++. To check an array has any NULL value, we will use the std::any_of() function from STL Algorithms. The std::any_of() function accepts three arguments, Advertisements Iterator pointing to the start of a sequence. Iterator pointing to the …