Every piece of knowledge must have a single, unambiguous, authoritative representation within a system. ~ Tip #15 from the book "The Pragmatic Programmer"

In realms of code, where logic weaves its spell,
A mantra whispers, breaking repetition's hell.
"DRY," it echoes, a wisdom bold and bright,
"Don't repeat yourself," let clarity take flight.

For duplicated lines, like weeds that choke the ground,
Stifle progress, where elegance is bound.
Redundancy's shadow, a burden to bear,
Drains developer's spirit, fills the air with despair.

But DRY's a beacon, a guiding star so true,
Banishing the clutter, revealing something new.
Functions and classes, like knights in shining guise,
Encapsulate knowledge, where logic never lies.

Abstraction's shield, a fortress built with care,
Hides the details, leaving beauty to share.
Interfaces stand firm, like walls against the tide,
Protecting the core, where functions reside.

Consistency's drumbeat, a rhythm to embrace,
Let naming conventions, find their rightful place.
No more tangled mess, no spelunking quest,
DRY's guiding light, leads to knowledge's nest.

For every truth, a single, sacred source,
A well of understanding, where logic takes its course.
No more duplication's whisper, soft and sly,
DRY's clarion call, rings truth to the sky.

So refactor with purpose, wield the DRYing blade,
Unravel the knots, where confusion pervaded.
Let code sing with clarity, a symphony of grace,
A testament to DRYness, leaving no trace.

In every line, a promise to uphold,
Knowledge unified, a story to be told.
For DRY's the secret, to a developer's delight,
More time for creation, bathed in logic's light.

So raise your keyboard, a banner held high,
Let DRY's wisdom guide you, as you code and fly.
For in the realm of code, where logic takes its stand,
DRY is the mantra, that makes software grand.