 String continuation across multiple lines, no newline characters
By : Said Laabadli
Date : March 29 2020, 07:55 AM
To fix this issue Am using the RODBC library to bring data into R. I have a long query that I want to pass a variable to, much like this SO user. code :
query <- gsub(pattern='\\s',replacement="",x=query)
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 Find specific text in string delimited by newline characters
By : Rui Menino
Date : March 29 2020, 07:55 AM
should help you out First of all I wouldn't keep the list of files in a single string, but I would use any sort of list or vector. Then if keeping the list in a string is a necessity of yours (for some kind of reason in your application logic) I would separate the string in a vector, then cycle through the elements of the vector checking if the element is exactly the one searched. To split the elements I would do: code :
std::vector<std::string> split_string(const std::string& str,
const std::string& delimiter)
{
std::vector<std::string> strings;
std::string::size_type pos = 0;
std::string::size_type prev = 0;
while ((pos = str.find(delimiter, prev)) != std::string::npos)
{
strings.push_back(str.substr(prev, pos - prev));
prev = pos + 1;
}
// To get the last substring (or only, if delimiter is not found)
strings.push_back(str.substr(prev));
return strings;
}
#include <iostream>
#include <string.h>
#include <vector>
using namespace std;
int main(){
string filename;
string list = "hello.txt\n abc.txt\n check.txt\n"
cin >> filename;
vector<string> fileList = split_string(list, "\n");
bool found = false;
for(int i = 0; i<fileList.size(); i++){
if(fileList.at(i) == file){
found = true;
}
}
if(found){
cout << file << "exist in list";
} else {
cout << "file does not exist in list";
}
return 0;
}
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 Using RegEx to Extract Multiple Lines Using Alternate End of Line Characters (newline, return, end of string)
By : FrankieB
Date : March 29 2020, 07:55 AM
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Build string with OS-specific newline characters (CRLF, LF, CR) to write it into a database table column
By : Naveen
Date : March 29 2020, 07:55 AM
I hope this helps you . One way to correctly set the new line code in R is to query the operating system. Since both OS X and Linux behave the same way, it's a question of determining whether the operating system is Windows. One way to do this is to interrogate the OS environment variable as follows. code :
if(substr(Sys.getenv("OS"),1,7) == "Windows") {
# set Windows newline
newLine <- "\r\n"
}
else {
# set non-Windows newline
newLine <- "\n"
}
paste("my text string on a line",newline,sep="")
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 Find substrings with multiple newline characters in string using Regex
By : Morten Fynbo
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further For Starting with \r\n+CMGL: and ending with \r\n you can use below regular expression :
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code :
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