1.try 永远不会抛出异常 在 没有的时候 返回 nil
province_id = Province.find_by_name(prov).try(:id)
2.find(:first, :condotions) 方法 不言而与
mobile_info = MobileInfo.find(:first, :conditions => ["mobile_num = ? ", mobi...
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其他好文 时间:
2014-08-06 10:32:31
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304
题目:Given an unsorted integer array, find the first missing positive integer.For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2.Your algorithm....
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编程语言 时间:
2014-08-04 13:34:47
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373
Lexicographicallyalgorithms:1. Iterate array from back to front, and find the first decreasing point: 1,2,4,3 -- 42. Iterate array from back to front,...
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其他好文 时间:
2014-08-02 05:11:02
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199
Given an unsorted integer array, find the first missing positive integer.For example,Given[1,2,0]return3,and[3,4,-1,1]return2.Your algorithm should ru...
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其他好文 时间:
2014-07-22 22:52:33
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166
Design an algorithm and write code to find the first common ancestory of two nodes in a binary tree. Avoid storing additional nodes in data structure....
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其他好文 时间:
2014-07-13 13:24:21
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279
Given an unsorted integer array, find the first missing positive integer.For example,Given[1,2,0]return3,and[3,4,-1,1]return2.Your algorithm should ru...
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其他好文 时间:
2014-07-05 18:37:04
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188
First Missing Positive:Given an unsorted integer array, find the first missing positive integer.For example,Given [1,2,0] return 3,and [3,4,-1,1] retu...
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其他好文 时间:
2014-07-01 13:13:59
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218
Given an unsorted integer array, find the first missing positive integer.For example,Given [1,2,0] return 3,and [3,4,-1,1] return 2.Your algorithm sho...
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其他好文 时间:
2014-06-27 22:24:34
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346
Given an unsorted integer array, find the first missing positive integer.
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其他好文 时间:
2014-06-27 12:39:02
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185
题目
Given an unsorted integer array, find the first missing positive integer.
For example,
Given [1,2,0] return 3,
and [3,4,-1,1] return 2.
Your algorithm should run in O(n) time and u...
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其他好文 时间:
2014-06-27 08:30:30
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202