Flutter: Assign Variable With String Only If Value Is Not Null

Question

I want to assign a variable only if the value is not null. However, I also need an extra string added to the variable to be used in video overlays (so need the extra min in this case). So I need minVal to return null if $time is null or return $time min if $time is populated. Currently, if $time is null, it still recognizes the "min" and is returning "min".

final minVal = '$time min' ?? null;

The code below works in returning null if $time is null, but I need the extra "min" string to be added somewhere. Any ideas?

final minVal = '$time' ?? null;

Sujan Gainju · Accepted Answer · 2022-08-31 17:32:37Z

4

You could check if $time is null or not using ternary operator

final minVal = time != null ? '$time min' : null;

edited Aug 31, 2022 at 17:32

answered Aug 31, 2022 at 17:20

Sujan Gainju

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3 Comments

Dennis Ashford Over a year ago

Thanks for the suggestion. That seems to still be returning min even if $time is null.

Sujan Gainju Over a year ago

SOrry forgot to remove $ in the comaprision. Updated the answer

Dennis Ashford Over a year ago

Thank for your help! I realized I was also using an older version of Flutter still in this project (no null safety). This is the correct way to do it.

Md. Yeasin Sheikh · Accepted Answer · 2022-08-31 17:33:09Z

0

String ? myVariable;
Text("${myVariable!=null?myVariable:""}");

if myVariable values is not equals null then return value else make null safety

edited Aug 31, 2022 at 17:33

Md. Yeasin Sheikh

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answered Aug 31, 2022 at 17:32

Dinesh kumar

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