Golang type conversion summary

There are 4 types of <code>type-conversions</code> in Go: <ul> <li>Assertion.</li> <li>Forced type conversion.</li> <li>Explicit type conversion.</li> <li>Implicit type conversion.</li> </ul> Commonly said type conversion refers to <code>assertion</code>, forced type conversion is not used in daily life, explicit is a basic type conversion, implicitly used but not noticed. The three categories of assertion, force, and explicit are all explained in the Go syntax description, and the implicit is summarized in the daily use process. Assertion Type Conversion. Asserts by judging whether a variable can be converted to a certain type. Note: Type assertions can only happen on <code>interfaces</code>. Let’s first look at a simple assertion expression. <pre> var s = x.(T)</pre> If <code>x</code> is not <code>nil</code>, and <code>x</code> can be converted to type <code>T</code>, the assertion succeeds, and a variable <code>s</code> of type <code>T</code> is returned. If <code>T</code> is not an <code>interface</code> type, the type of <code>x</code> is required to be <code>T</code>, and if <code>T</code> is an <code>interface</code>, <code>x</code> is required to implement the <code>T</code> interface. If the assertion type is <code>true</code>, the return value of the expression is <code>x</code> of type <code>T</code>, and <code>panic</code> will be triggered if the assertion fails. If the assertion fails, it will <code>panic</code>. Go provides another assertion syntax with the return: <pre> s, ok := x.(T)</pre> This method is almost the same as the first one, but <code>ok</code> will return whether the assertion is successful without <code>panic</code>, and <code>ok</code> indicates whether it is successful. <a href="https://levelup.gitconnected.com/golang-type-conversion-summary-dc9e36842d25">Click Here</a>