RegexdrillReformat MM/DD/YYYY as YYYY-MM-DD
A regex exercise from Regexdrill. Solve it with a pattern box with live highlighting in your browser, checked against hidden test strings, and it is checked the moment you submit.
The task
Rewrite every date written MM/DD/YYYY as YYYY-MM-DD. Leave everything else unchanged.
What this exercise teaches
(\d{2})/(\d{2})/(\d{4}) with the replacement $3-$1-$2 and the g flag reorders every date on the line.
A hint if you get stuck
Capture the three parts, then put them back in a new order with $1, $2 and $3 in the replacement.
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