<The Art of Readable Code> 笔记一

第1章 代码应易理解 (Code should be easy to understand)

1 合习惯

Node* node = list->head;
if (node == NULL) return;

while(node->next != NULL) {
Print(node->data)
node = node->next;
}
if(node != NULL) Print(node->data);

for (Node* node = list->head; node != NULL; node = node->next)
Print(node->data);

2 少 ≠ 好

// if 语句
if(exponent >= 0) {
return mantissa * (1 << exponent);
} else {
return mantissa / (1 << -exponent);
}

// 条件运算符
return exponent >= 0 ? mantissa * (1 << exponent) : mantissa / (1 << -exponent);

// 不易理解
assert ((!(bucket = FindBucket(key))) || !bucket->IsOccupied());

// 易理解
bucket = FindBucket(key);
if(bucket != NULL) asset(!bucket->IsOccupied());

3 加注释

// Fast version of "hash = (65599 * hash) + c"
hash = (hash << 6) + (hash << 16) -hash + c;