Unverified50% confidenceFactExact time
CSV 导入时全由数字组成的字段会被自动类型推断为整数,导致美国邮编前导零丢失(如 01234 变成 1234)
1
Sources
50%
Confidence
Long-term
Relevance
7/24/2026
First Seen
Sources
Related Claims
UnverifiedWhen the divisor is a compile-time known constant, modern compilers (such as GCC, Clang, and MSVC) automatically convert the division into a combination of multiplication by a magic number and a shift operation.64% similarUnverified在PHP 7及之前,0 == 'foo'为true,PHP 8.0将数字与非数字字符串的比较改为字符串比较,使0 == 'foo'变为false58% similarUnverifiedOne-hot encoding assigns each word in the vocabulary a unique index, representing it with a vector that has a 1 only at that index position and 0s elsewhere; the dot product of any two different one-hot vectors is always 0 (orthogonal).52% similarUnverified在绝大多数编程语言中数组索引从0开始(zero-based indexing)51% similarUnverifiedC标准中的未定义行为(UB)涵盖有符号整数溢出、空指针解引用、越界数组访问等操作,C标准对其结果不作任何保证50% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/609219API
curl https://kongchang.com/api/v1/knowledge/claims/609219MCP
get_claim(id=609219)