null Archives - IT Nursery

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

Is it safe to check a pointer to not being NULL by writing simply if(pointer) or do I have to use if(pointer != … Read more

Setting Objects to Null/Nothing after use in .NET

by IT Nursery

Should you set all the objects to null (Nothing in VB.NET) once you have finished with them? I understand that in .NET it … Read more

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

by IT Nursery

I have made a small xslt file to create an html output called weather.xsl with code as follows: <!– DWXMLSource=”http://weather.yahooapis.com/forecastrss?w=38325&u=c” –> <xsl:stylesheet version=”1.0″ … Read more

nil detection in Go

by IT Nursery

I see a lot of code in Go to detect nil, like this: if err != nil { // handle the error } … Read more

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

by IT Nursery

In the early days of C++ when it was bolted on top of C, you could not use NULL as it was defined … Read more

getActivity() returns null in Fragment function

by IT Nursery

I have a fragment (F1) with a public method like this public void asd() { if (getActivity() == null) { Log.d(“yes”,”it is null”); … Read more

MySQL CONCAT returns NULL if any field contain NULL

by IT Nursery

I have following data in my table “devices” affiliate_name affiliate_location model ip os_type os_version cs1 inter Dell 10.125.103.25 Linux Fedora cs2 inter Dell … Read more

How to set enum to null

by IT Nursery

I have an enum string name; public enum Color { Red, Green, Yellow } How to set it to NULL on load. name … Read more

Select rows which are not present in other table

by IT Nursery

I’ve got two postgresql tables: table name column names ———– ———————— login_log ip | etc. ip_location ip | location | hostname | etc. … Read more

Filter values only if not null using lambda in Java8

by IT Nursery

I have a list of objects say car. I want to filter this list based on some parameter using Java 8. But if … Read more