Section1 Difference between object/basic type/literal

22 minutes31 seconds

Section2 Extract a list from a string

22 minutes37 seconds

Section3 How to detect existing and non-empty string

16 minutes05 seconds

Section4 Replace matching substring with new string

08 minutes41 seconds

Section5 Get the content that meets the conditions and highlight the results (1)

15 minutes59 seconds

Section6 Obtain content that meets the conditions and highlight the results (2)

15 minutes04 seconds

Section7 The wonderful use of capturing parentheses in regular expressions

19 minutes28 seconds

Section8 simple digital clock

09 minutes55 seconds