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I have been trying to understand the difference between the variables created with or without $. For Example In @ngrx/store we declare Actions like

export class SomeEffectClass {
    constructor(**private actions$ : Actions**) {}
}

Is the below code similar in functionality as above

export class SomeEffectClass {
    constructor(**private actions : Actions**) {}
}
Vivek Singh
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1 Answers1

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This is the exact same code. It's just a convention you can use, such as underscores like _actions.

In this case, the dollar sign is used to indicate that your property is an Observable. You can find it more here