Какова цель использования делегата в качестве параметра для Func в использовании IApplicationBuilder (Func & lt; RequestDelegate, RequestDelegate & gt; промежуточное программное обеспечение)
Вот что я считаю лучшим решением.
library(stringdist)
library(gdata)
#Convert numeric words to digits
isNumericWord=function(string, dist=1, method="dl"){
nums=c("zero","one","two","three","four","five","six","seven","eight","nine",
"ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen",
"twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety",
"hundred","thousand","million","billion","trillion")
return(any(stringdist(tolower(string),nums,method=method)<=dist))
}
numberTypes=function(string, dist=1, method="dl"){
nums=c("zero","one","two","three","four","five","six","seven","eight","nine",
"ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eighteen","nineteen",
"twenty","thirty","forty","fifty","sixty","seventy","eighty","ninety",
"hundred","thousand","million","billion","trillion")
string=gsub("[[:punct:]]"," ",string)
wrdsplit=strsplit(string,split=" ")[[1]]
wrdsplit=wrdsplit[wrdsplit!=""]
#Handle number types
wrdsplit=ifelse(stringdist("first",tolower(wrdsplit),method=method)<=dist,"one st",wrdsplit)
wrdsplit=ifelse(stringdist("second",tolower(wrdsplit),method=method)<=dist,"two nd",wrdsplit)
wrdsplit=ifelse(stringdist("third",tolower(wrdsplit),method=method)<=dist &
tolower(substr(wrdsplit,nchar(wrdsplit),nchar(wrdsplit)))!="y","three rd",wrdsplit)
wrdsplit=ifelse(stringdist("fourth",tolower(wrdsplit),method=method)<=dist &
tolower(substr(wrdsplit,nchar(wrdsplit),nchar(wrdsplit)))!="y","four th",wrdsplit)
wrdsplit=ifelse(stringdist("fifth",tolower(wrdsplit),method=method)<=dist &
tolower(substr(wrdsplit,nchar(wrdsplit),nchar(wrdsplit)))!="y","five th",wrdsplit)
wrdsplit=ifelse(stringdist("sixth",tolower(wrdsplit),method=method)<=dist &
tolower(substr(wrdsplit,nchar(wrdsplit),nchar(wrdsplit)))!="y","six th",wrdsplit)
wrdsplit=ifelse(stringdist("seventh",tolower(wrdsplit),method=method)<=dist &
tolower(substr(wrdsplit,nchar(wrdsplit),nchar(wrdsplit)))!="y","seven th",wrdsplit)
wrdsplit=ifelse(stringdist("eighth",tolower(wrdsplit),method=method)<=dist &
tolower(substr(wrdsplit,nchar(wrdsplit),nchar(wrdsplit)))!="y","eight th",wrdsplit)
wrdsplit=ifelse(stringdist("ninth",tolower(wrdsplit),method=method)<=dist &
tolower(substr(wrdsplit,nchar(wrdsplit),nchar(wrdsplit)))!="y","nine th",wrdsplit)
wrdsplit=ifelse(stringdist("tenth",tolower(wrdsplit),method=method)<=dist,"ten th",wrdsplit)
wrdsplit=ifelse(stringdist("twentieth",tolower(wrdsplit),method=method)<=dist,"twenty th",wrdsplit)
wrdsplit=ifelse(stringdist("thirtieth",tolower(wrdsplit),method=method)<=dist,"thirty th",wrdsplit)
wrdsplit=ifelse(stringdist("fortieth",tolower(wrdsplit),method=method)<=dist,"forty th",wrdsplit)
wrdsplit=ifelse(stringdist("fiftieth",tolower(wrdsplit),method=method)<=dist,"fifty th",wrdsplit)
wrdsplit=ifelse(stringdist("sixtieth",tolower(wrdsplit),method=method)<=dist,"sixty th",wrdsplit)
wrdsplit=ifelse(stringdist("seventieth",tolower(wrdsplit),method=method)<=dist,"seventy th",wrdsplit)
wrdsplit=ifelse(stringdist("eightieth",tolower(wrdsplit),method=method)<=dist,"eighty th",wrdsplit)
wrdsplit=ifelse(stringdist("ninetieth",tolower(wrdsplit),method=method)<=dist,"ninety th",wrdsplit)
#Handle other number words that end in "th"
if(length(wrdsplit)>0){
for(i in 1:length(wrdsplit)){
substr_end=substr(wrdsplit[i],(nchar(wrdsplit[i])-1),nchar(wrdsplit[i]))
substr_beg=substr(wrdsplit[i],1,(nchar(wrdsplit[i])-2))
if(substr_end=="th" & nchar(wrdsplit[i])!=2 & any(stringdist(tolower(substr_beg),nums,method=method)<=dist)){
wrdsplit[i]=paste(substr_beg, substr_end,sep=" ")
}
}
return(gsub(" "," ",paste(wrdsplit,collapse=" ")))
}else{
return("")
}
}
#Convert number words to digits
Word2Num=function(string, dist=1, method="dl"){
original=string
#Define numbers
one_digits = list(zero=0, one=1, two=2, three=3, four=4, five=5,
six=6, seven=7, eight=8, nine=9)
teens = list(eleven=11, twelve=12, thirteen=13, fourteen=14, fifteen=15,
sixteen=16, seventeen=17, eighteen=18, nineteen=19)
ten_digits = list(ten=10, twenty=20, thirty=30, forty=40, fifty=50,
sixty=60, seventy=70, eighty=80, ninety=90)
large_digits = list(hundred=100, thousand=1000, million=1e6, billion=1e9, trillion=1e12)
double_digits = c(teens,ten_digits)
#Split the string into words
string=gsub("-"," ",gsub(" & ", " and ",string,ignore.case=T))
string=numberTypes(string)
wrdsplit=strsplit(tolower(string)," ")[[1]]
wrdsplit=wrdsplit[wrdsplit!=""]
isNumber=apply(data.frame(wrdsplit),1,isNumericWord)
#Find groups of numbers
if(exists("groups")){
suppressWarnings(rm(groups))
}
i=1
while(i <= length(wrdsplit)){
if(isNumber[i]==T){
if(!exists("groups")){
groups=list(wrdsplit[i])
}else if(exists("groups")){
groups=c(groups, wrdsplit[i])
}
for(j in (i+1):length(wrdsplit)){
if(isNumber[j]){
groups[[length(groups)]]=c(groups[[length(groups)]],wrdsplit[j])
i=j+1
}else{
i=i+1
break
}
}
}else{
i=i+1
}
}
#Convert numeric words to numbers
if(exists("groups")){
groupNums=groups
for(j in 1:length(groups)){
for(i in 1:length(groups[[j]])){
#If word is a single digit number
if(any(stringdist(groups[[j]][i],names(one_digits),method=method)<=dist &
tolower(substr(groups[[j]][i],nchar(groups[[j]][i]),nchar(groups[[j]][i])))!="y")){
#If word is a single digit number
groupNums[[j]][i]=one_digits[stringdist(groups[[j]][i],names(one_digits),method=method)<=dist][[1]]
}else if(any(stringdist(groups[[j]][i],names(double_digits),method=method)<=dist)){
#If word is a double digit number
groupNums[[j]][i]=double_digits[stringdist(groups[[j]][i],names(double_digits),method=method)<=dist][[1]]
}else if(any(stringdist(groups[[j]][i],names(large_digits),method=method)<=dist)){
#If word is a large digit number
groupNums[[j]][i]=large_digits[stringdist(groups[[j]][i],names(large_digits),method=method)<=dist][[1]]
}
}
}
#Convert the separated numbers to a single number
defscipen=options("scipen")[[1]]
options(scipen=999)
for(i in 1:length(groups)){
if(length(groupNums[[i]])==1){
groupNums[[i]]=as.numeric(groupNums[[i]][1])
}else{
while(length(groupNums[[i]])>=2){
if(nchar(groupNums[[i]][2])>nchar(groupNums[[i]][1])){
#If the next word has more digits than the current word, multiply them
temp=as.numeric(groupNums[[i]][1])*as.numeric(groupNums[[i]][2])
}else if(nchar(groupNums[[i]][2])<nchar(groupNums[[i]][1])){
#if the next word has less digits than the current word, add them
temp=as.numeric(groupNums[[i]][1])+as.numeric(groupNums[[i]][2])
}
#Combine the results
if(length(groupNums[[i]])>2){
groupNums[[i]]=c(temp, groupNums[[i]][3:length(groupNums[[i]])])
}else{
groupNums[[i]]=temp
}
}
}
}
#Recreate the original string
groupNums=lapply(groupNums, as.character)
options(scipen=defscipen)
for(i in 1:length(groups)){
wrdsplit[which(wrdsplit==groups[[i]][1])]=groupNums[[i]][1]
if(length(groups[[i]]>1)){
wrdsplit[which(wrdsplit==groups[[i]][2:length(groups)])]=""
}
}
#Combine numbers with their endings
wrdsplit=wrdsplit[wrdsplit!=""]
if(any(wrdsplit[which(wrdsplit %in% unlist(groupNums))+1] %in% c("rd","th","st","nd"))){
locs=which(wrdsplit %in% unlist(groupNums))
for(i in length(locs):1){
wrdsplit[locs[i]]=paste(wrdsplit[c(locs[i],(locs[i]+1))],collapse="")
wrdsplit=wrdsplit[-(locs[i]+1)]
}
}
return(trim(paste(wrdsplit,collapse=" ")))
}else{
return(original)
}
}
1
задан itsbpk 13 July 2018 в 04:34
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1 ответ
. Одним из ключевых моментов промежуточного программного обеспечения .Net Core является то, что вы можете выполнить «короткое замыкание» общего исполнения конвейера, поэтому каждое промежуточное программное обеспечение имеет возможность вызывать следующее промежуточное ПО (что-то вроде «сотрясения») это выполнение в RequestDelegate) или вернуться. Вот почему вам нужно Func<RequestDelegate, RequestDelegate>, что-то вроде app.Use(next => async context => { }), как указано в комментарии @PrabhatSinha.
Вот как это происходит:
app.Use(async (context, next) =>
{
// Do something before next middleware
if (someDecision) // decision if we will run next
{
await next.Invoke(); // next middleware
// Do something after next middleware
}
});
Просто используя Use(RequestDelegate delegateVariableName) недостаточно. Вы можете узнать об этом здесь . Это очень хорошая статья.
0
ответ дан vasily.sib 17 August 2018 в 13:41
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