Without looking:
'1. null === undefined: ' + false; '2. null == undefined: ' + true; '3. 2+"4": ' + '24'; '4. 2-"3": ' + -1; '5. ""+2: ' + '2'; '6. +"2": ' + 2;
I love these! I even have a codepen that's kind of like this
Oh, yeah, I know my weird Javascript math 🎉
1 and 2 I know because of work since null and undefined can be a pain when testing. 3 is string concatination with 2 being made a string to make it magically work. 4 is making the string a number to make the math operator magically work. 5 is similar to 3 in that it's concatinating an (empty) string with a number that magically becomes a string. 6 is fun because + is the shorthand for type converting to an int.
+
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Without looking:
I love these! I even have a codepen that's kind of like this
Oh, yeah, I know my weird Javascript math 🎉
1 and 2 I know because of work since null and undefined can be a pain when testing.
3 is string concatination with 2 being made a string to make it magically work.
4 is making the string a number to make the math operator magically work.
5 is similar to 3 in that it's concatinating an (empty) string with a number that magically becomes a string.
6 is fun because
+is the shorthand for type converting to an int.