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问题 I'm trying to scan/query an AWS DynamoDB table for a list of items where id (a single string) is not equal to any of strings A, B, C, D, etc. I've tried something like this: for (String itemString : items) { scanExpression.addFilterCondition("id", new Condition().withComparisonOperator(ComparisonOperator.NE) .withAttributeValueList(new AttributeValue().withS(itemString))); } PaginatedScanList<Items> result = mapper.scan(Item.class, scanExpression); What appears to happen is that each time I

问题 #include <stdio.h> #include <stdlib.h> #include <string.h> #define RECORDS 10 The function below is what I am asking for help with. static char searchforRecordbystate(char input[3]) { for / while /if loop search struct array members if a match is found return (print) the entire struct where a match was found return 0; } Main function - first time ever using pointers, (xcode is not complaining with it set to be as strict as possible) but all of you are welcome to complain, especially if I am

问题 I'm writing up a series of graph-searching algorithms in F# and thought it would be nice to take advantage of parallelization. I wanted to execute several threads in parallel and take the result of the first one to finish. I've got an implementation, but it's not pretty. Two questions: is there a standard name for this sort of function? Not a Join or a JoinAll, but a JoinFirst? Second, is there a more idiomatic way to do this? //implementation let makeAsync (locker:obj) (shared:'a option ref)

问题 I need to develop an IFilter for Microsoft Search Server 2008 that performs prolonged computations to extract text. Extracting text from one file can take from 5 seconds to 12 hours. How can I desing such an IFilter so that the daemon doesn't reset it on timeout and also other IFilters can be reset on timeout if they hang up? 回答1: 12 hours, wow! If it takes that long and there are many files, your best option would be to create a pre-processing application that would extract the text and make

问题 I need to develop an IFilter for Microsoft Search Server 2008 that performs prolonged computations to extract text. Extracting text from one file can take from 5 seconds to 12 hours. How can I desing such an IFilter so that the daemon doesn't reset it on timeout and also other IFilters can be reset on timeout if they hang up? 回答1: 12 hours, wow! If it takes that long and there are many files, your best option would be to create a pre-processing application that would extract the text and make

问题 I am writing a lua program that has a table which is a member of another table. When I add a new date to that member table everything is ok. But when I want to search in that table no matter what key I give I always get the last row added to the table. How do I search properly in that member table? Stream = {name = ""} function Stream:new(obj, name) obj = obj or {} setmetatable(obj, self) self.__index = self self.name = name or "default" --[[ declaration and initialization of another table

问题 First, this is a homework assignment. I am having a tough time with regex, and I'm stuck. This is the code I have so far, where I have the user designate a filename, and if it exists, populates a hash of the names as keys, and the phone numbers as the values. #!/usr/bin/perl use strict; print "\nEnter Filename: "; my $file = <STDIN>; chomp $file; if(!open(my $fileName, "<", "$file")) { print "Sorry, that file doesn't exist!", "\n"; } else { my %phoneNums; while (my $line=<$fileName>) { chomp(

问题 I have a deeply nested array as follows: {[{ id: "1", experts: [ {instruments: [{guitar: ["John", "Maria"], piano: ["Hans", "Sarah", "Nancy"] }], name: "Columbia Records", published: "1930" }, {instruments: [{guitar: ["Pablo"], drums: ["Jeb", "Xiao"]} ], name: "Atlas Records", published: "1978" } ] ]}, { id: "2", experts: [ {instruments: [{sitar: ["Anaka", "Reha"], chello: ["Hans", "Raphael", "Stuart"]} ], name: "Touchstone Records", published: "1991" }, {instruments: [{viola: ["Richard",

问题 I am building a forum and I am looking for the proper way to build a search feature that finds users by their name or by the title of their posts. What I have come up with is this: SELECT users.id, users.user_name, users.user_picture FROM users, subject1, subject2 WHERE users.id = subject1.user_id AND users.id = subject2.user_id AND (users.user_name LIKE '%{$keywords}%' OR subject1.title1 LIKE '%{$keywords}%' OR subject2.title2 LIKE '%{$keywords}%') ORDER BY users.user_name ASC LIMIT 10

问题 I'm new to Python dictionaries. I'm making a simple program that has a dictionary that includes four names as keys and the respective ages as values. What I'm trying to do is that if the user enters the a name, the program checks if it's in the dictionary and if it is, it should show the information about that name. This is what I have so far: def main(): people = { "Austin" : 25, "Martin" : 30, "Fred" : 21, "Saul" : 50, } entry = input("Write the name of the person whose age you'd like to