duplicates

问题 I know questions similar to this have been asked many, many times on Stack Overflow, but I need to remove duplicate tuples from a list, but not just if their elements match up, their elements have to be in the same order. In other words, (4,3,5) and (3,4,5) would both be present in the output, while if there were both (3,3,5) and (3,3,5) , only one would be in the output. Specifically, my code is: import itertools x = [1,1,1,2,2,2,3,3,3,4,4,5] y = [] for x in itertools.combinations(x,3): y

问题 I know questions similar to this have been asked many, many times on Stack Overflow, but I need to remove duplicate tuples from a list, but not just if their elements match up, their elements have to be in the same order. In other words, (4,3,5) and (3,4,5) would both be present in the output, while if there were both (3,3,5) and (3,3,5) , only one would be in the output. Specifically, my code is: import itertools x = [1,1,1,2,2,2,3,3,3,4,4,5] y = [] for x in itertools.combinations(x,3): y

问题 I know questions similar to this have been asked many, many times on Stack Overflow, but I need to remove duplicate tuples from a list, but not just if their elements match up, their elements have to be in the same order. In other words, (4,3,5) and (3,4,5) would both be present in the output, while if there were both (3,3,5) and (3,3,5) , only one would be in the output. Specifically, my code is: import itertools x = [1,1,1,2,2,2,3,3,3,4,4,5] y = [] for x in itertools.combinations(x,3): y

问题 I know questions similar to this have been asked many, many times on Stack Overflow, but I need to remove duplicate tuples from a list, but not just if their elements match up, their elements have to be in the same order. In other words, (4,3,5) and (3,4,5) would both be present in the output, while if there were both (3,3,5) and (3,3,5) , only one would be in the output. Specifically, my code is: import itertools x = [1,1,1,2,2,2,3,3,3,4,4,5] y = [] for x in itertools.combinations(x,3): y

问题 New to R and would like to do the following operation: I have a set of numbers e.g. (1,1,0,1,1,1,0,0,1) and need to count adjacent duplicates as they occur. The result I am looking for is: 2,1,3,2,1 as in 2 ones, 1 zero, 3 ones, etc. Thanks. 回答1: We can use rle rle(v1)$lengths #[1] 2 1 3 2 1 data v1 <- c(1,1,0,1,1,1,0,0,1) 来源： https://stackoverflow.com/questions/33528106/r-counting-adjacent-duplicate-items

问题 I have found the following way for removing duplicates: DELETE FROM table_name A WHERE a.rowid > ANY ( SELECT B.rowid FROM table_name B WHERE A.col1 = B.col1 AND A.col2 = B.col2 ); Could someone explain me step by step how does the query works? TIA! 回答1: In Oracle, ROWID is a pseudo column points to the physical location of a row. The query does a self join and fetches those rows which have the same value of column 1 & column 2 - with the assumption that these keys are enough to identify as

问题 I need to remove duplicate rows in my Access database, does anyone have generic query to do this? As I have this problem with multiple tables 回答1: There are two things you need to do, Determine what the criteria are for a unique record - what is the list of columns where two, or more, records would be considered duplicates, e.g. JobbID and HisGuid Decide what you want to do with the duplicate records - do you want to hard delete them, or set the IsDeleted flag that you have on the table Once

问题 Duplicate class javax.el.ArrayELResolver found in modules jsp-api-2.1-6.1.14.jar (org.mortbay.jetty:jsp-api-2.1:6.1.14) and jsp-api-2.1.jar (javax.servlet.jsp:jsp-api:2.1) Duplicate class javax.el.BeanELResolver found in modules jsp-api-2.1-6.1.14.jar (org.mortbay.jetty:jsp-api-2.1:6.1.14) and jsp-api-2.1.jar (javax.servlet.jsp:jsp-api:2.1) Duplicate class javax.el.BeanELResolver$BeanProperties found in modules jsp-api-2.1-6.1.14.jar (org.mortbay.jetty:jsp-api-2.1:6.1.14) and jsp-api-2.1.jar

问题 I have a simple table set up with two columns, each column is a key value. the values stored in each field are varchar(45) representing an email address and a keyword. It is possible that the information collected may duplicate itself as it is related to site browsing data collection. To avoid duplicate entries, I used tried to use INSERT IGNORE into, REPLACE into, and finally I'm trying the following: insert into <table name> (user_email, key_token) values ('<email>@<this>.com',

问题 I have a list of strings like this: ['**', 'foo', '*', 'bar', 'bar', '**', '**', 'baz'] I want to replace the '**', '**' with a single '**' , but leave 'bar', 'bar' intact. I.e. replace any consecutive number of '**' with a single one. My current code looks like this: p = ['**', 'foo', '*', 'bar', 'bar', '**', '**', 'baz'] np = [p[0]] for pi in range(1,len(p)): if p[pi] == '**' and np[-1] == '**': continue np.append(p[pi]) Is there any more pythonic way to do this? 回答1: Not sure about