virtual-credit-card
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A robust Java-based virtual credit card management system featuring constant-time operations, multi-key indexing, and scalable architecture. Utilizes HashMaps for O(1) lookups, implements memory-efficient data structures, and supports multi-user card management. Offers card addition, removal, card/user searches, and card info display.
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May 22, 2025 - Java
Anonymous crypto funded virtual credit cards (VCC) and PayPal gift balance.
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Updated
Jul 1, 2026 - HTML
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