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Deleting elements
There are several ways to delete elements from a list. If you know the index of the element you want, you can use pop: pop modifies the list...
分类:其他好文   时间:2014-07-16 19:26:12    阅读次数:189
Jsoup-数据修改
在你解析一个Document之后可能想修改其中的某些属性值,然后再保存到磁盘或都输出到前台页面。可以使用属性设置方法Element.attr(String key, String value), 和Elements.attr(String key, String value).假如你需要修改一个元素...
分类:Web程序   时间:2014-07-16 17:47:50    阅读次数:307
Tuning SQL via case when statement
原SQL如下:SQL的主要问题是红色部分居然通过标量查询,反复的查找与SQL相同的基表,很显然这个可以用case when来简化。select a.TRAN_ID,a.AMOUNT,a.BALANCE,a.INVAMT,a.PROMISED,a.INVNO,a.RCLNUM,b.PROBLEM_ID...
分类:数据库   时间:2014-07-16 17:12:14    阅读次数:332
初探boost之smart_ptr库学习笔记
概述   Boost.smart...
分类:其他好文   时间:2014-07-16 11:24:55    阅读次数:276
Partition an array around an interger
Partition an array of integers around a value such taht all elements less than x come before elements greater than or equal to x.Idea: Just use of sub...
分类:其他好文   时间:2014-07-15 22:52:15    阅读次数:239
POJ2155 Matrix 【二维树状数组】+【段更新点查询】
Matrix Time Limit: 3000MS   Memory Limit: 65536K Total Submissions: 17766   Accepted: 6674 Description Given an N*N matrix A, whose elements are either 0 or 1. A[i, j] ...
分类:其他好文   时间:2014-07-15 12:24:44    阅读次数:319
A Product Array Puzzle
Given an array arr[] of n integers, construct a Product Array prod[] (of same size) such that prod[i] is equal to the product of all the elements of a...
分类:其他好文   时间:2014-07-15 10:03:20    阅读次数:216
gcc编译参数-fPIC问题 `a local symbol' can not be used when making a shared object;
gcc -shared -o hack.so hack.c/usr/bin/ld: /tmp/ccUZREwA.o: relocation R_X86_64_32 against `a local symbol' can not be used when making a shared object...
分类:其他好文   时间:2014-07-14 19:26:29    阅读次数:1539
Traversing a list
The most common way to traverse the elements of a list is with a for loop. The syntax is the same as for strings: This works well if you onl...
分类:其他好文   时间:2014-07-13 19:38:51    阅读次数:324
Spiral Matrix II
Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order. For example, Given n = 3, You should return the following matrix: [ [ 1, 2, 3 ], [ 8, 9, 4 ], [...
分类:其他好文   时间:2014-07-13 16:37:16    阅读次数:199
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