1、面向对象的类定义、对象实例化、修改属性和引用对象。 1 package firstproject; 2 //定义一个car类 3 class Car 4 { 5 //描述颜色 6 String color="blue"; 7 //描述轮胎数 8 int n=4; ...
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编程语言 时间:
2015-03-31 17:31:29
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152
String sqlStr="select t.car_kind,count(t) from table1 t where t.jb_date='"+jb_date+"' and t.state='"+state+"' and t.sbzt='1' and t.bureau_code='"+ljdm...
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其他好文 时间:
2015-03-31 17:27:14
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137
Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases.
For example,
"A man, a plan, a canal: Panama" is
a palindrome.
"race a car" is not a
...
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其他好文 时间:
2015-03-31 12:54:59
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114
对象比较,当同一个类的两个实例的所有属性都相等时,可以使用比较运算符==进行判断,当需要判断两个变量是否为同一个对象的引用时,可以使用全等运算符===进行判断。class Car {}$a = new Car();$b = new Car();if ($a == $b) echo '=='; /.....
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其他好文 时间:
2015-03-30 11:08:50
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109
练习4-3原文Exercise 4.3. Rewrite eval so that the dispatch is done in data-directed style. Compare this with the datadirected differentiation procedure of exercise 2.73. (You may use the car of a compound...
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其他好文 时间:
2015-03-30 09:33:38
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167
题目链接:gas-station
/**
*
There are N gas stations along a circular route, where the amount of gas at station i is gas[i].
You have a car with an unlimited gas tank and it costs cost[i] of ...
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其他好文 时间:
2015-03-30 09:25:15
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163
There areNgas stations along a circular route, where the amount of gas at stationiisgas[i].You have a car with an unlimited gas tank and it costscost[...
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其他好文 时间:
2015-03-29 23:35:11
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137
练习3-71原文代码(define (Ramanujan s)
(define (stream-cadr s) (stream-car (stream-cdr s)))
(define (stream-cddr s) (stream-cdr (stream-cdr s)))
(let ((scar (stream-car s))...
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其他好文 时间:
2015-03-29 12:21:38
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122
练习3-69原文代码
(define (triples s t u)
(cons-stream (list
(stream-car s)
(stream-car t)
(stream-car u))
(interleave
(stream-map (lambda (x) (cons (stream-car s)...
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其他好文 时间:
2015-03-29 10:50:16
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118
练习3-70原文代码(define (merge-weighted s1 s2 weight)
(cond ((stream-null? s1) s2)
((stream-null? s2) s1)
(else
(let ((cars1 (stream-car s1))
(cars2 (stream-car s2)))
(cond (...
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其他好文 时间:
2015-03-29 10:50:12
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132