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I want to concatenate two strings into a single variable.
String datas1 = "demo1 String2" ;
String datas2 = "String1" ;
i want to get string be like:
String datas3 = "demo1String1 String2"
how to do that?
Don't miss to use " or ' to mention the start and end of String.
String datas1 = "ajnk muhammed";
Or
String datas1 = 'ajnk muhammed';
Related
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I want to split the below file into multiple files based on content;
Input file:
HC05361 3036690000002020072814093990 R
DC05361 00100001CD 03113 075992733625
HC05362 3036690000002020072814103991 R
DC05362 00100001CD 03113 075992733625
HC05615 3024173024172020091408223795 R
DC05615 00100001NDL 00016 856115004682
DC05615 002000011 295013 825646252404
DC05615 003000011 295617 825646248490
Output files:
File1:
HC05361 3036690000002020072814093990 R
DC05361 00100001CD 03113 075992733625
File2:
HC05362 3036690000002020072814103991 R
DC05362 00100001CD 03113 075992733625
File3:
HC05615 3024173024172020091408223795 R
DC05615 00100001NDL 00016 856115004682
DC05615 002000011 295013 825646252404
DC05615 003000011 295617 825646248490
This works for me, but I think you may need to provide more information.
Like...
What you want the filenames to be?
What you know about the data
For example, do you always want to split on lines that start with HC? Are the values in the first column always going to be in the form HC#####?
Making a few assumptions, this is a basic example of what you could do.
This will iterate through every line in the file. If the line starts with HC#####, then it outputs that line and every following line to a file with that name. When it reaches a new HC##### value, it changes that to the file name:
$data = Get-Content .\sample.txt
foreach ($line in $data) {
if ($line -match '^HC[0-9]+') {
$fileName = "$($Matches[0]).txt"
}
Add-Content -Value $line -Path $fileName
}
This is assuming the first line will always provide us a filename.
It's also assuming that you want to split on lines starting with HC
It's also not performing any sort of exception handling.
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I have text as below,
TIME STAMP1
A1200 EVENT START
EVENT NAME = DOS
EVENT_INS = 1
EVENT_ID = 100
BUFFER = 233355
FORMAT = ATC
LOC = C:/User/data
;
TIME STAMP2
A1201 EVENT START
EVENT NAME = DOS
EVENT_INS = 0
EVENT_ID = 87
BUFFER = 773355
FORMAT = ETC
LOC = C:/User/data
;
how can I remove TIME STAMP2 based on A1201,need to remove from A1201 to ; using scala.A1201 sensor part will repeat at different location in the file. Wherever it comes, I need to remove from A1201 to ;..
How can I do with Scala Spark ?.
You can use the following simple solution
val rdd = sparkContext.wholeTextFiles("path to the text file")
rdd.map(x => x._2.replace("\n", "|*|").split(";").filter(!_.contains("A1201")).mkString(";").replace("|*|", "\n")+";")
where, wholeTextFiles would read the file in Tuple2 format with filename as first argument and text data as the second argument
x._2.replace("\n", "|*|") replaces the line feeds with special character which is to be used later
.split(";") splits the text at ; and forms array
.filter(!_.contains("A1201")) filters out all text from A1201 to ;
.mkString(";").replace("|*|", "\n")+";" converts the array of string to original format.
I hope the answer is helpful
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I want to transform a string to a categorical array in which the categories are the characters.
If you want to make a cell-array of strings (chars) then use the cellstr() function. This will turn each row of a char array into a separate string in a cell-array. Since your string variable is a single row, use the single-quote character to transpose it to a column and then use cellstr():
string ='abcd'
A = cellstr(string') % The single quote after the string variable transposes it to a column
The output A will be columnar, so to get a row cell-array stick another single quote after the A, for example in use with categorical() as you mention:
B = categorical(A')
You can use num2cell for this purpose as follows:
string ='abcd';
num2cell(string)
Output:-
ans =
'a' 'b' 'c' 'd'
strings in matlab are already really a vector of characters.
str = 'abcd';
length(str) %4
str(1) %a
str(2:3) %bc
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Can somebody explain to me the algorithm for the Parenthesis Balancing problem?
"Is the string (code) syntax correct on account of matching parentheses couples?"
I can't figure it out apart from the fact that for each " ( " there should be another " ) " for the algorithm to return true.
Thanks!
I found this solution but I do not understand it and I don't want to copy and paste it:
def balance(chars: List[Char]): Boolean = {
def balanced(chars: List[Char], open: Int): Boolean = {
if (chars.isEmpty) open == 0
else
if (chars.head == '(') balanced(chars.tail,open+1)
else
if (chars.head == ')') open>0 && balanced(chars.tail,open-1)
else balanced(chars.tail,open)
}
balanced(chars,0)
}
This code recursively checks if string contains matching amount of opening and closing parentheses by calling balanced() on the string without first element.
Expectancy of parentheses in the string is kept in a kind of balance indicator open - positives indicate amount of needed ')' and negatives amount of needed '('. Initial balance is 0.
When recursion reaches end of string it checks if balance is ok (open == 0), e.g. there was matching amount of parentheses seen.
There is also a check (open > 0) to ensure that ')' wasn't encountered before there was '(' it could close.
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I'm calling an exe command :
myCmd = fullfile('working',myCommand.bat');
[status,message] = system(myCmd )
status = 0
message =
processing value ...
complete
activating command ...
complete
How could I get some text from message ?
For example i would like to get the "first text" and "complete" to check the first action is completed ?
Thanks
Use the echo command to include a return message:
[status,message] = system('yourCommand && echo hello world' )
will return:
message =
hello world
Generally you will need to create a string where you cascade all your commands connected with &&. One of the commands could then be echo something.
Regarding your edit:
output = 'processing value ...'
command = ['cd ' myCMD ' && myCommand.bat' ' && echo ' output];
[status,message] = system( command )
will call myCommand.bat and return "processing value...".