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原创记一个诡异的ES查询失败

下面的查询条件只有第一个查不出来: 1. 出发城市：北京，沙县 2. 出发城市：北京 3. 出发城市：北京，上海 4. 出发城市：北京，沙县 & 到达城市：上海ES数据库中不存在depCity为沙县的文档查询语句1 出发城市：北京，沙县 { "from" : 0, "size" : 20, "query" : { "bool" : { "must" : {

2016-09-21 00:47:58 2240

原创 "Calendars" and "DateFormats" should not be static

“Calendars” and “DateFormats” should not be static 级别：bug, multi-threading Not all classes in the standard Java library were written to be thread-safe. Using them in a multi-threaded manner is h

2016-09-01 00:13:27 1521

原创 BigDecimal(double)

“BigDecimal(double)” should not be used 级别：bug Because of floating point imprecision, you’re unlikely to get the value you expect from the BigDecimal(double) constructor.From the JavaDocs: Th

2016-08-30 00:54:14 1821

原创 @Deprecated & @Override

1. @Deprecated” code should not be used 级别：cwe, obsolete, owasp-a9, security Once deprecated, classes, and interfaces, and their members should be avoided, rather than used, inherited or extende

2016-08-28 17:09:43 2492

原创不要使用equals方法对AtomicXXX进行是否相等的判断

1. “.equals()” should not be used to test the values of “Atomic” classes 级别：bug AtomicInteger, and AtomicLong extend Number, but they’re distinct from Integer and Long and should be handled diff

2016-08-26 00:42:50 4819

原创堆排序（算法导论实现）

#include #include using namespace std;int heap_size;int left(int i){ return 2 * i + 1;}int right(int i){ return 2 * i + 2;}void exchange(vector& v, int k, int largest){ int temp = v[k];

2015-07-22 20:57:05 576

原创二叉树的前序、中序、后续遍历，递归、非递归实现

前序遍历递归：#include #include using namespace std;struct TreeNode { int val; TreeNode *left; TreeNode *right; TreeNode(int x) : val(x), left(NULL), right(NULL) {}};void pre_order_recursive(TreeN

2015-07-22 15:47:06 596

#include using namespace std;/* *把数组从中间分为2部分，分别将两部分排好序后，调用merge将2个有序序列合并成1个有序序列 * */void merge(int* arr, int start, int mid, int end){int* p = new int[1000];int* q = new int[1000];for(int i = start; i

2015-07-19 22:31:57 477

原创快速排序&易错点

#include using namespace std;int partition(int* arr, int p, int q){ int pivot = arr[p]; while (p < q) // while中统一使用p < q 而不是p <= q { while(pivot <= arr[q] && p < q) q--; arr[p] = arr[q];

2015-07-19 21:55:35 737

原创读《Finding and evaluating community structure in networks》Newman&Girvan

待编辑

2013-09-21 09:30:08 5274 1

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