lookup

问题 Here is a function which I wrote: lookup <- function (keys, values, key, default) { found <- which(keys == key) if (length(found) == 1) return(values[found]) if (length(found) == 0) return(default) stop("lookup(",keys,",",values,",",key,",",default,"): duplicate keys") } and it does what I need just fine: > lookup(c("a"),c(3),"a",0) [1] 3 > lookup(c("a"),c(3),"b",0) [1] 0 > lookup(c("a","a"),c(3),"a",0) Error in lookup(c("a", "a"), c(3), "a", 0) : lookup(aa,3,a,0): duplicate keys the question

问题 I am trying to check whether symbol getaddrinfo_a exists using CMake: list(APPEND CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE) check_symbol_exists(getaddrinfo_a netdb.h HAVE_GETADDRINFO_A) list(REMOVE_ITEM CMAKE_REQUIRED_DEFINITIONS -D_GNU_SOURCE) While getaddrinfo_a is defined in netdb.h (given that _GNU_SOURCE is defined), CMake fails to find it: -- Looking for getaddrinfo_a -- Looking for getaddrinfo_a - not found. Any idea what am I doing wrong? 回答1: According to the getaddrinfo_a man page,

问题 This is related to Working with dictionaries/lists in R, where we try to create a key-value style dictionary with vectors, but now about how to access the values. I can get the keys in the following way foo <- c(12, 22, 33) names(foo) <- c("tic", "tac", "toe") names(foo) [1] "tic" "tac" "toe" and I can access the elements > lapply(FUN=function(a){foo[[a]]},X = 1:length(foo)) [[1]] [1] 12 [[2]] [1] 22 [[3]] [1] 33 and then I can do unlist(lapply(FUN=function(a){foo[[a]]},X = 1:length(foo))) [1

问题 I am very new to R, and I am currently to apply however little knowledge of R I have to an analytical work I have to perform for work. I have two dataframes - dataframe A consists of transactions details, while dataframe B consists of the monthly closing exchange rate for various currencies. Data frame A - transaction details TRANSACTION_ID COLLECTION_CRNCY COLLECTION_AMT MMYYYY LODG_DATE 1 0001 INR 305000 Mar 2014 2014-03-01 2 0002 USD 15000 Oct 2014 2014-10-31 3 0003 JPY 85000 Feb 2015 2015

问题 I am using a GlassFish-3.1.2 server running in my subnet (192.168.1.3:3700). I already deployed an enterprise app including an EJB in which i defined a business method. Now I want to remotely access the EJB from my java application client. How do i have to setup the JNDI resp. the InitialContext object for doing the lookup of the EJB ? How do I need to define the properties? Btw. I had to run "asadmin enabled-secure-admin" in order to make the GlassFish server work on the LAN. Probably I also

问题 I am using $lookup for joining different collections in mongoDB. Now i am facing a problem here suppose i have 3 collections given below. user_movies { "_id": "_id" : ObjectId("5834ecf7432d92675bde9d83"), "mobile_no": "7941750156" "movies" : ["dallas00", "titanic00", "green_mile00"] } movies { "_id": "_id" : ObjectId("4834eff7412d9267556d9d52"), "movie_name" : "Dallas Buyer's Club", "movie_id": "dallas00", "active": 0 } movie_comments { "_id": "_id" : ObjectId("1264eff7412d92675567h576"),

问题 I have a list of cells with text strings (notes) and I need to check each cell if it contains a word from the search list. Each note will only contain one of the search words. If a note contain a search word, the function need to return a Level 1 text and a Level 2 text. If a note does not contain any of the search Words, the function must return "No L1" and "No L2". The note can contain the search word in any part of the textstring and it can contain both letters, numbers and basic signs

问题 I'm a Python newbie with a very particular itch to experiment with Python's dot-name-lookup process. How do I code either a class or function in "make.py" so that these assignment statements work succesfully? import make make.a.dot.separated.name = 666 make.something.else.up = 123 make.anything.i.want = 777 回答1: #!/usr/bin/env python class Make: def __getattr__(self, name): self.__dict__[name] = Make() return self.__dict__[name] make = Make() make.a.dot.separated.name = 666 make.anything.i

问题 I have a 123MB big int array, and it is basically used like this: private static int[] data = new int[32487834]; static int eval(int[] c) { int p = data[c[0]]; p = data[p + c[1]]; p = data[p + c[2]]; p = data[p + c[3]]; p = data[p + c[4]]; p = data[p + c[5]]; return data[p + c[6]]; } eval() is called a lot (~50B times) with different c and I would like to know if (and how) I could speed it up. I already use a unsafe function with an fixed array that makes use of all the CPUs. It's a C# port

问题 I'm just learning DDD (Eric Evans book is open in front of me) and I've come across a problem that I can't find an answer for. What do you do in DDD when you're just trying to get a simple list of lookup records? Ex. EmployeeID: 123 EmployeeName: John Doe State: Alaska (drop-down) County: Wasilla (drop-down -- will be filtered based on state). For example, let's say that you have an Employee domain object, an IEmployeeRepository interface and an EmployeeRepository class. This will be used by