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6 questions, 1 pages, 20 questions on this page

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JavaScript - check nested object properties for null/undefined

Let's say I have an object: it gets populated through the course of using the app, for example: At another place in the code I want to check if myObject.metadata.type exists. If it doesn't exists, the...

1 answers

568

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JavaScript - remove undefined and null values from object using lodash

I have an object like: How can I remove all the null and undefined properties?

1 answers

519

0 points

JavaScript - why is null an object and what's the difference between null and undefined?

Why is null an object type and what's the difference between null and undefined? When I'm checking: it's the same as: also:

1 answers

646

0 points

JavaScript - filter null values from array

I need to remove false, undefined, null, 0, "" and NaN values from an array. Anyone can help me with this?

1 answers

718

3 points

MySQL - select only rows where removal_time is NULL

How to select only rows where removal_time is NULL with MySQL? Doesn't work: It can be executed, but it doens't return any values at all - NULL or NOT NULL. How to make it work?

1 answers

178290

3 points

Java switch with null - how to handle it?

How do I handle null in switch statement in java? For example when I have class like this: With this example when I try to compile it I have 2 compilation errors from Intellij Idea: Dereference of 'na...

java

switch

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0 answers