Undefined Is Not Null: There Is a Difference – JavaScript Developer Humor Classic T-Shirt
Designed and sold by CalmWorldShop
$16.49
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Style
Classic T-ShirtEveryday tee, crew neck, generous fit
$16.49
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- The standard, traditional t-shirt for everyday wear
- Classic, generous, boxy fit
- Heavyweight fabric, solid colors are 100% preshrunk cotton
- Male model shown is 6'2" / 188 cm tall and wearing size Large
- Primary female model shown is 5'3" / 160 cm tall and wearing size Small
- Secondary Female model shown is 5'9" / 175 cm tall and wearing size Medium
- Washing instructions: Hand or machine wash cold. Do not dry clean, bleach, tumble dry or iron on the print
- The third party printer of this product is evaluated according to International Labor Organization standards
- The printer of this product sources blanks from manufacturers committed to improving cotton farming practices with the Better Cotton Initiative
- Since every item is made just for you by your local third-party fulfiller, there may be slight variances in the product received
Undefined Is Not Null: There Is a Difference – JavaScript Developer Humor
undefined !== null // there is a difference. Every JavaScript developer has been bitten by this one: two values that look like “nothing” but aren’t the same thing, and a strict equality operator that knows it. This design shows the comparison as a block of code in terminal green and red, with the punchline written as a code comment.
Made for web developers, frontend engineers and anyone who has ever debugged a “cannot read properties of undefined” error at 2 a.m. A good fit for code review survivors, team chats and coworker gift swaps.
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