[英]Difference between String + char and String + single char String
"ab" + 'c' // String + char
"ab" + "c" // String + String of single char
What is the difference between these expressions?这些表达有什么区别?
Using A + "B" is much slower than using A + 'B' based on this test result根据这个测试结果,使用 A + "B" 比使用 A + 'B' 慢得多
Concatenate char literal ('x') vs single char string literal (“x”) 连接字符文字('x')与单个字符字符串文字(“x”)
Test Result:测试结果:
averageing to:平均到:
a+'B': 4608ms a+'B':4608ms
a+"B": 5167ms a+“B”:5167ms
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