“`”<\/p>\n
<\/p>\n
<h4>\u5185\u7f6e\u51fd\u6570\uff1amap\u3001reduce\u3001filter\u7684\u7528\u6cd5\u548c\u533a\u522b<\/h4><\/p>\n
<strong>map<\/strong>:\u6839\u636e\u51fd\u6570\u5bf9\u6307\u5b9a\u5e8f\u5217\u505a\u6620\u5c04<\/p>\n
<pre><code>map
\n\u53c2\u6570
\n\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\uff1a\u4e00\u4e2a\u662f\u51fd\u6570\uff0c\u4e00\u4e2a\u662f\u5e8f\u5217\uff08\u53ef\u8fed\u4ee3\u5bf9\u8c61\uff09
\n\u8fd4\u56de\u503c
\nPython2 \u8fd4\u56de\u5217\u8868
\nPython3 \u8fd4\u56de\u8fed\u4ee3\u5668<\/p>\n
# \u4f8b\u5b50\uff1a
\n# abs() \u51fd\u6570\u8fd4\u56de\u6570\u5b57\u7684\u7edd\u5bf9\u503c
\n# \u65b0\u7684\u5185\u5bb9\u7684\u4e2a\u6570\u7b49\u4e8e\u539f\u5185\u5bb9\u7684\u4e2a\u6570
\n# ret = map(abs,[-1,-5,6,-7])
\n# print(list(ret))
\n# [1, 5, 6, 7]
\n<\/code><\/pre><\/p>\n
<strong><em>*filter*<\/em>:<\/strong>\u8fc7\u6ee4\u51fd\u6570 \u65b0\u7684\u5185\u5bb9\u5c11\u4e8e\u7b49\u4e8e\u539f\u5185\u5bb9\u7684\u65f6\u5019\u3002\u624d\u80fd\u4f7f\u7528filter<\/p>\n
<pre><code>filter() \u51fd\u6570\u7528\u4e8e\u8fc7\u6ee4\u5e8f\u5217\uff0c\u8fc7\u6ee4\u4e0d\u7b26\u5408\u6761\u4ef6\u7684\u5143\u7d20\uff0c\u8fd4\u56de\u7531\u7b26\u5408\u6761\u4ef6\u5143\u7d20\u7ec4\u6210\u7684\u5fc3\u5217\u8868<\/p>\n
\u53c2\u6570\uff1a
\nfunction \u51fd\u6570
\niterable \u53ef\u8fed\u4ee3\u5bf9\u8c61
\n\u8fd4\u56de\u503c:
\n\u8fd4\u56de\u5217\u8868<\/p>\n
# \u7b5b\u9009\u5927\u4e8e10\u7684\u6570
\ndef is_odd(x):
\n if x>10:
\n return True<\/p>\n
ret = filter(is_odd,[1,4,5,7,8,9,76]) # \u4e3a\u8fed\u4ee3\u5668
\nprint(list(ret))
\n# [76]
\n<\/code><\/pre><\/p>\n
<strong>reduce<\/strong>:\u5bf9\u4e8e\u5e8f\u5217\u5185\u6240\u6709\u5143\u7d20\u8fdb\u884c\u7d2f\u8ba1\u64cd\u4f5c<\/p>\n
<pre><code>'''
\nreduce() \u51fd\u6570
\nreduce() \u51fd\u6570\u4f1a\u5bf9\u53c2\u6570\u5e8f\u5217\u4e2d\u5143\u7d20\u8fdb\u884c\u7d2f\u79ef
\n\u51fd\u6570\u5c06\u4e00\u4e2a\u6570\u636e\u96c6\u5408(\u94fe\u8868\u3001\u5143\u7ec4\u7b49)\u4e2d\u7684\u6240\u6709\u6570\u636e\u8fdb\u884c\u4e0b\u5217\u64cd\u4f5c
\n'''<\/p>\n
from functools import reduce
\ndef add(x,y):
\n return x + y<\/p>\n
print(reduce(add,[1,2,3,4,5]))
\n# 15<\/p>\n
print(reduce(lambda x, y: x+y, [1,2,3,4,5])) # 15<\/p>\n
print(reduce(add,range(1,101)))
\n# 5050
\n<\/code><\/pre><\/p>\n
\u00a0<\/p>\n
\u00a0<\/p>\n
\u00a0<\/p>\n
<pre><code> "“`
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