compare

问题 I'm writing a program which groups turtles into different groups. I am trying to write a command where if there is a turtle in a different group within a 1 until radius of the turtle the command runs. This is what I have to confront ask turtles [if [ group ] of turtles in-cone 1 180 != group [set color brown]] end However the command is coming out true even when there is not a turtle in a different group nearby. 回答1: may be something like : to confront ask turtles if any? turtles in radius 2

问题 I have a live server and my dev server, and I am finding that queries on my LIVE (not dev) server run 10x slower, even though the live server is more powerful and they are both running comparable load. It's not a database structure thing because I load the backup from the live server into my dev server. Does anybody have any ideas on where I could look for the discrepancy? Could it be a MySQL config thing? Where should I start looking? Live Server: mysql> SELECT count(`Transaction`.`id`) as

问题 Take these two arrays in PHP: $array1 = [ 2 => 'Search', 1 => 'Front-End / GUI' ]; $array2 = [ 1 => 'Front-End / GUI', 2 => 'Search' ]; Most of the array comparison functions do not care about order. Doing an array_diff will result in an empty array. What's the most efficient / shortest / cleanest way to compare two arrays with regard to order and: show whether or not they are equal (true / false)? show the difference (such as for PHPUnit)? Running $this->assertEquals( $array1, $array2 ); in

问题 Using SQL 2005, is there a way to select the minimum value between 5 columns within one single row of data? So, if I have a row of data like this: id num1 num2 num3 num4 num5 1 22 51 4 99 34 Then, how can I get the lowest value using SQL? 回答1: You can create a UDF. create function GetMin(@N1 int, @N2 int, @N3 int, @N4 int, @N5 int) returns table as return (select min(N) as Value from (select @N1 union all select @N2 union all select @N3 union all select @N4 union all select @N5) as T(N)) And

问题 I want to find a string within another string in R. The strings are as follows. I want to be able to match string a to string b as and the out put should be a == b which returns TRUE a <- "6250;7250;6251" b <- "7250" a == b #FALSE 回答1: If b were to equal 725 instead of 7250 , would you still want the result to be TRUE ? If so then the grepl answer already given will work (and you could speed it up a bit by setting fixed=TRUE since there are no patterns to be matched. If you only want TRUE

问题 I have two files. File A has some entries in each line and I need to find if any entry is found in File B . Here is my script (using two functions): def readB(x): with open('B.txt') as resultFile: for line in resultFile: if x in line: print x def readA(): with open('A.txt') as bondNumberFile: for line in bondNumberFile: readB(line) readA() This script finds the first entry in second file and then does not finds the next one. What might be wrong here? File A looks like this: 122323 812549

问题 This question already has answers here : Java error: Comparison method violates its general contract (9 answers) Closed 3 years ago . I'm trying to sort my custom NewsAdapter by a Date property of the Articles_Map object, and I've noticed that in cases with bigger data sets my app crashes with a java.lang.IllegalArgumentException: Comparison method violates its general contract! error. I'm not sure if that error happens because of an int overflow, or if it is indeed related to the transitive

问题 I want to use proc compare to update dataset on a daily basis. work.HAVE1 Date Key Var1 Var2 01Aug2013 K1 a 2 01Aug2013 K2 a 3 02Aug2013 K1 b 4 work.HAVE2 Date Key Var1 Var2 01Aug2013 K1 a 3 01Aug2013 K2 a 3 02Aug2013 K1 b 4 03Aug2013 K2 c 1 Date and Key are uniquely determine one record. How can I use the above two tables to construct the following work.WANT Date Key Var1 Var2 01Aug2013 K1 a 3 01Aug2013 K2 a 3 02Aug2013 K1 b 4 03Aug2013 K2 c 1 I don't want to delete the previous data and

问题 I tried filecmp.cmp(file1,file2) but it doesn't work since files are identically except for new line characters. Is there an option for that in filecmp or some other convenience function/library or do I have to read both files line by line and compare those? 回答1: I think a simple convenience function like this should do the job: from itertools import izip def areFilesIdentical(filename1, filename2): with open(filename1, "rtU") as a: with open(filename2, "rtU") as b: # Note that "all" and

问题 Is it possible to compare two arrays and remove the values that are equal (if they are at the same index), without iterating through both arrays? Here is an example: $array1 = @(1,2,3,4,5,6,7,23,44) $array2 = @(1,1,3,4,5,7,6,23,45) $array3 = $sudo_compare_function $array1 $array2 where $array3 would now contain an array of indexes where $array2 is different from $array1 array: (1,5,6,8) If there isn't something like this, is there an easy way to do something similar without iterating through