string index out of range

Town Field Poem:Cheng listens to the Tathagata language, the world name and benefit of Dayton. Be willing to do the Tibetan apostles, the broad show is by Sanfu mention.I would like to do what I learned, to achieve a conscience blog. May all the Yimeimei, reproduce the wisdom of the body.——————————————————————————————————————————CodeMystr= ' Hellohello ' resoffindllo=mystr.find (' LLO ') #存在, returns the first occurrence of the index value of the fir

Os:windows7 x64Jdk:jdk-8u131-windows-x64Ide:eclipse Oxygen Release (4.7.0)CodePackage Jizuiku.t00;public class Demo5 {public static void main (string[] args) {//Index value 012345String str = "abc012345432 10CBA "; int beginindex = 2;int EndIndex = 5;//does not include the character corresponding to this index, why? Look at the source code, you

Two days ago, it was reported that the string was out of bounds. It was found that an error occurred while taking the position of a character. In the past, lastIndexOf was used to obtain this character and it was not found in the searched string. Solution: verify whether the character exists before obtaining the position. If (name. lastIndexOf ("Form ")! =-1 ){ Name = name. substring (0, name. lastIndexOf (

The previous two days quoted string out of bounds, found in the lookup, should be to take the position of a certain character, error, the original use of LastIndexOf to get this character in the search string is not. Workaround, before taking the position, verify that the character exists. if (Name.lastindexof ("Form")!=-1) { Name = name.substring (0, Name.lastindexof ("Form")); } JScript Language Reference

Analysis of Index Condition Pushdown (under the ICP Index Condition) and Multi-Range Read (MRR Index Multi-Range lookup) query optimization in MySQL, Source: http://www.cnblogs.com/wy123/p/7374078.html(The Source retained is not the right of original works. My work is far f

, the first step is to get the data, the second step is to obtain the data for conditional filtering.Obviously, compared to the latter, the former can be a step to achieve index search seek+filter, more efficient.Adaptation of the scene:The ICP optimization strategy can be used for range, ref, EQ_REF, ref_or_null types of Access data methodsIn fact, no example is not very good to understand the optimization

Tags: error sorting B-Tree range query tag raise engine name marginOriginal: Analysis of the index Condition pushdown (under ICP index) and Multi-range Read (MRR indexed multi-range lookup) query optimization in MySQL The source of this article: http://www.cnblogs.com/wy123/

Index range scan ): 1. for unique index, if the where condition is followed by 2. For none unique index, if the where condition is followed by =,>, 3. For composite indexes, if the bootstrap column of the composite index appears after the where condition,

MySQL-optimized MRR (Multi-Range Read: secondary index merged back to table), mrrmulti-range MRR is introduced in MySQL5.6 for optimization:List index range scan and need to return to the table. The principle is to sort multiple secondary indexes that need to be returned to

low selectivity. You can create a composite index to enhance the low field selectivity and avoid the side effects of creating an index with low selectivity; Minimize possible_keys. Correct indexes will increase the SQL query speed. Excessive indexes will increase the cost of selecting indexes by the optimizer. Do not abuse indexes; Review the business scenarios of combined

Town Field Poem:Cheng listens to the Tathagata language, the world name and benefit of Dayton. Be willing to do the Tibetan apostles, the broad show is by Sanfu mention.I would like to do what I learned, to achieve a conscience blog. May all the Yimeimei, reproduce the wisdom of the body.——————————————————————————————————————————Code#看下面的列子, length 11, last index 10newmember=[0,1,2,3,4,5,6,7,8,9,1]print (newmember) arg=1ind=newmember.index (ARG) print

:1161) 12-25 22:52:50.252: E/AndroidRuntime(813): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1032) 12-25 22:52:50.252: E/AndroidRuntime(813): at android.database.sqlite.SQLiteDatabase.query(SQLiteDatabase.java:1200) The code is as follows public Player getPlayer(String name) { SQLiteDatabase db = this.getReadableDatabase(); String[] projection = {

For the text search engine inverted index (data structure and algorithm), scoring system, word segmentation system are clearly mastered, I have a lot of value index and search has been a great interest, recently to Lucene on the numerical index and range search to do some learning, and the main content is organized as

Lucene uses the index structure of the character (word) type. The index and storage of numeric types will eventually be converted to character types.Earlier versions Lucene did not encapsulate a public class of numeric types. You need to convert the number directly into a string and add it to the field first.Java code:1 New Document (); 2 long i = 123456L;3 Do

For the text search engine inverted index (data structure and algorithm), scoring system, word segmentation system are clearly mastered, I have a lot of value index and search has been a great interest, recently to Lucene on the numerical index and range search to do some learning, and the main content is organized as

See a post in the forum, the post has some SQL aspects of the question, I think these questions are very representative.The connection of the original posts is: http://bbs.csdn.net/topics/390884161?page=1#post-398177057Here is my solution, for your reference:1. Splitting stringsCREATE TABLE test1 (number varchar) INSERT into test1 values (' 1,2,3,4,5,6 ') desired result: number------123456 (6 rows affected)My Solution:--1. Split string CREATE TABLE te

What to do if you encounter parameter index out of range (1 > # of parameters, which is 0). May 12, 2011, Thursday 23:45 Parameter index out of range (1 > # parameters, which is 0) was encountered and many errors were checked. Finally found that the original preparedstatement in the SQL. Cannot have ' single quotes '

sorting operation. If we use the index on the right for the query, the results will be different. We didn't put the sorting field at the end, but put it at the front. Instead, we put the filtering field behind. The result is that we will traverse the node with the value of 1 (one on the left of the right). if the country value is A or G, it will be directly placed in the result set. After the query is completed for the specified number of limit insta

B * Tree Index Range Scan of CBO, cborange Reprinted please indicate the source: http://blog.csdn.net/guoyjoe/article/details/44262353 **************************************** ******************** Ii. CBO's B * Tree Index Range Scan-IRS Algorithm**************************************** ********************* 1. Create

Java.lang.StringIndexOutOfBoundsException:String index out of range:0When you do a query in hibernatelist. Setfirstresult ((currentPageIndex-2) * showcounts). Setmaxresults (Showcounts). Setresulttransformer (Org.hibernate.transform.Transformers.ALIAS_TO_ENTITY_MAP). List ();When the queried data cannot be empty in the database, but when the database is empty, this error is reported because of the problem w