lookup

问题 I have the following log4j2 configuration <?xml version="1.0" encoding="UTF-8"?> <Configuration status="TRACE"> <Appenders> <RollingRandomAccessFile name="SQLTiming" fileName="${web:rootDir}/log/SQLTiming.log" filePattern="${web:rootDir}/log/SQLTiming-%d{yyyy-MM-dd}.log"> <PatternLayout pattern="%d{HH:mm:ss.SSS} %-5level %logger{2} - %msg%n" /> <Policies> <TimeBasedTriggeringPolicy /> </Policies> </RollingRandomAccessFile> <Console name="CONSOLE"> <PatternLayout pattern="%d{HH:mm:ss.SSS} %

问题 I have a table that I'm trying to populate based on the values of two reference tables. I have various different projects 'Type 1', 'Type 2' etc. that each run for 4 months and cost different amounts depending on when in their life cycle they are. These costings are shown in Ref Table 1 . Ref Table 1 Month | a | b | c | d --------------------------------- Type 1 | 1 | 2 | 3 | 4 Type 2 | 10 | 20 | 30 | 40 Type 3 | 100 | 200 | 300 | 400 Ref Table 2 shows my schedule of projects for the next 3

问题 Unlike Dictionary , you cannot construct a Lookup by adding elements one by one. Do you happen to know the reason? Lookup is just like multimap in C++; why can't we modify it in C#? If we really can't, how can we construct a multimap data structure in C#? 回答1: Lookup and ILookup were introduced as part of LINQ, which generally takes a more functional approach than other aspects of the framework. Personally I like the fact that Lookup is (at least publicly) immutable - and I'm looking forward

问题 I try ejb lookup for jndi name. That ejb is same jboss server then is success. But ejb is other jboss server then is failed. My source code: Hashtable<String, String> env = new Hashtable<String, String>(); env.put("java.naming.provider.url","jnp://192.168.100.10:8484"); env.put("java.naming.factory.initial", "org.jboss.as.naming.InitialContextFactory"); env.put("java.naming.factory.url.pkgs", "org.jboss.as.naming.interfaces.java"); env.put("java.naming.security.principal", "Admin"); env.put(

问题 In R, I have, for example: > foo <- list(a=1,b=2,c=3) If I type foo , I get: $a [1] 1 $b [1] 2 $c [1] 3 How can I look through foo to get a list of "keys" only? In this case, (a, b, c). 回答1: An R list can have named elements and so function as a dictionary structure. You can just do: > names(foo) [1] "a" "b" "c" If you are looking for a dictionary structure you might also consider using the hash packages which provides a Python and Perl like dictionary/hash with the expected functions such as

问题 #!/bin/bash # Command line look up using Google's define feature - command line dictionary echo "Type in your word:" read word /usr/bin/curl -s -A 'Mozilla/4.0' 'http://www.google.com/search?q=define%3A+'$word \ | html2text -ascii -nobs -style compact -width 500 | grep "*" Dumps a whole series of definitions from google.com an example is below: Type in your word: world * universe: everything that exists anywhere; "they study the evolution of the universe"; "the biggest tree in existence" *

问题 The title says it all. How come if a document does not result in any matching outer document according to its matching field, then how come it's not included in the pipeline's result set? I'm testing out the new aggregators in Mongo 3.2 and I've gone so far as to perform a nested array lookup by first unwinding, and then grouping the documents back up. All I have left is to have the results include all local documents that didn't meet the $lookup criteria, which is what I thought was the

问题 Is there a way to require multiple keys for the .ToLookup function provided by LINQ? I will admit that this seems non-intuitive at first, and I'm expecting that there's no actual way to do this, but I'm hoping that someone knows a way. I basically want to be able to lookup by two values, for example a string and an int , and retrieve the object with those two values. Example public class MyClass { public string StringProp {get;set;} public int IntProp {get;set;} public object MoreData {get

问题 Got a new mac and now I'm trying to install/update some stuff. THe first issue I get is that http requests made from inside scripts/programs (such as git or ruby gem) doesn't work. I'll put an example below of the workaround I used because it illustrates the issue better than any explanation. Any help is appreciated! Leonardos-MacBook-Air:~ leo$ git clone git://github.com/sstephenson/rbenv.git .rbenv Cloning into '.rbenv'... fatal: Unable to look up github.com (port 9418) (nodename nor

问题 I am using the SystemPropertiesLookup lookup to configure my Log4J2 configuration. The system properties get set as the first line in my main method. The problem is that, when Log4J loads the configuration, the main method is not yet called, and so, the system properties are not yet filled in. Here is my log4j2.xml: <?xml version="1.0" encoding="UTF-8"?> <configuration status="WARN" packages="org.base"> <appenders> <Console name="Console" target="SYSTEM_OUT"> <PatternLayout pattern="