So I'm trying to create a Graph from a file input. The first line of the file contains an int and the second line in the file contains either a D or a U for directed and undirected. But when I did some troubleshooting to try and find the error in my code I found that my Scanner was scanning the second line as an empty string instead of the letter D. Here's my code. I rewrote the file so I know the file isn't wrong.
The file is:
7
D
(0, 1)
(0, 3)
.
.
.
Code:
public static Graph createFromFile(String filename) throws FileNotFoundException
{
File file = new File(filename);
Scanner scan = new Scanner(file);
int line1 = scan.nextInt();
vertexCount = line1;
System.out.println(vertexCount);
String line2 = scan.nextLine();
System.out.println(line2);
String linne2 = "\"" + line2 + "\"";
System.out.println(linne2);
if(linne2.equalsIgnoreCase("D")){directed = true;}
else if(linne2.equalsIgnoreCase("U")){directed = false;}
else{System.out.println("This is not the proper input");}
}
The output is:
7
""
This is not the proper input
Does anybody know where this issue is coming from?
scan.nextInt function doesn't take the execution to next line. So, scan.nextLine call is still on your first line and it returns rest of the data from first line , which in this case is basically space. Use one more scan.nextLine and it will give you expected result.
Also , please go through the documentation of Scanner class , it will clear your doubts
Related
I have a multidimensional string vector, gameState. The contents of gameState can be seen below. I would like to "move" A up one space by making [2][1] = " " and [1][1] = "A". But I'm getting an error (error: invalid conversion from 'const char*' to '__gnu_cxx::__alloc_traitsstd::allocator<char, char>::value_type' {aka 'char'} [-fpermissive]). Not sure if there is a way to use vector.at() in this case. Here is a snippet. The full code reads in the initial game state from a text file and assigns it to the string vector gameState. I get the row and col indexes for each letter in the grid below and assign them to variables (eg. Arow and Acol). I'm very new to C++, so any help would be appreciated. If you have any questions about the rest of the code, I'd be happy to elaborate. Thanks in advance.
int Arow;
int Acol;
vector<string> gameState;
string tempU = gameState[Arow-1][Acol];
if (tempU != "#") {
// if no wall is up, move up
gameState[Arow][Acol] = " ";
gameState[Arow-1][Acol] = "A";
Arow = Arow-1;
Amovesequence.push_back("U");
}
###########
#...#P...B#
#A#.$.###*#
#...#D...R#
###########
The type of gameState[Arow-1][Acol] is a char, not a string. Modify the code accordingly, e.g.: char tempU = ... and replace " " with ' 'etc.
i wanted to create my bot in VBScript (i know its like troll and bad idea probably, i can do it in lua, python, C#, PHP, ...., but i decided to try and make it from vbscript)
the hard part is that i'm trying to Retrieve information from Telegram getUpdates
i've made this code for example and it kind of works, i'll explain what works and what doesn't
Dim fso, outFile, TeleTest
Set fso = CreateObject("Scripting.FileSystemObject")
Set outFile = fso.CreateTextFile("output.txt", True)
set TeleTest = fso.CreateTextFile("TeleTest.txt", True)
Dim url, req, json
Set req = CreateObject("MSXML2.XMLHTTP")
url = "https://api.telegram.org/bot"[TOKEN]"/getUpdates"
req.open "GET", url, False
req.send
If req.Status = 200 Then
TeleTest.Write req.responseText
End If
' Load the JSON array into a JsonArray:
set jsonArray = CreateObject("Chilkat_9_5_0.JsonArray")
success = jsonArray.Load("TeleTest.txt")
If (success <> 1) Then
outFile.WriteLine(jsonArray.LastErrorText)
WScript.Quit
End If
' Get some information from each record in the array.
numRecords = jsonArray.Size
i = 0
Do While i < numRecords
outFile.WriteLine("------ Record " & i & " -------")
' jsonRecord is a Chilkat_9_5_0.JsonObject
Set jsonRecord = jsonArray.ObjectAt(i)
outFile.WriteLine(" ok: " & jsonRecord.StringOf("ok"))
outFile.WriteLine(" result: " & jsonRecord.SizeOfArray("result"))
' Examine information for this record
u = 0
Do While u < nummessage
nummessage = jsonRecord.SizeOfArray("result[u].message")
Loop
outFile.WriteLine("Number of message: " & nummessage)
j = 0
Do While j < nummessage
jsonRecord.J = j
outFile.WriteLine(" message text: " & jsonRecord.StringOf("result[j].message[j].text"))
j = j + 1
Loop
i = i + 1
Loop
outFile.Close
so the first part that should get updates and save it ino TeleTest.txt works fine, it gets updates, it saves the json in to the .txt file (or anything, i can also save it into string in the vbs, or .json file)
the problem is that the second part where i'm using Chilkat gives error
Blockquote
ChilkatLog: Load:
ChilkatVersion: 9.5.0.78
Unable to get array at index 0. --Load
--ChilkatLog
any help or any idea would be appereciated, also if Chilkat is not good for doing this, maybe tell me why and give me something else?! (Chilkat was the only dll i found to work with vbscript and does json reading, stuff)
i got it to working, i found out that from this example
Chilkat needs the Json file to like this
[ { json } ]
but the Telegram json is like this
{ json }
so, the fix would be easy to just change line 15 from TeleTest.Write req.responseText to this code below
TeleTest.Write "[" + req.responseText + "]"
my code now works fine , if anyone else found something wrong or any answer to my question it would be appreciated
i hope someone else who needs this find this
From a linter provider, I receive a Point compatible array(line, column) where the error occured. Now I would like to hightlight the word surrounding that point, basically the result one would get if that exact point was double-clicked in the editor. Something like
const range = textEditor.getWordAtPosition(point)
Is what I hoped for, but couldn't find in the documentation.
Thanks for your help!
After looking around for a while, there seems to be no API method for the given need. I ended up writing a small helper function based upon this answer:
function getWordAtPosition(line, pos) {
// Perform type conversions.
line = String(line);
pos = Number(pos) >>> 0;
// Search for the word's beginning and end.
const left = Math.max.apply(null, [/\((?=[^(]*$)/,/\)(?=[^)]*$)/, /\,(?=[^,]*$)/, /\[(?=[^[]*$)/, /\](?=[^]]*$)/, /\;(?=[^;]*$)/, /\.(?=[^.]*$)/, /\s(?=[^\s]*$)/].map(x => line.slice(0, pos).search(x))) + 1
let right = line.slice(pos).search(/\s|\(|\)|\,|\.|\[|\]|\;/)
// The last word in the string is a special case.
if (right < 0) {
right = line.length - 1
}
// Return the word, using the located bounds to extract it from the string.
return str.slice(left, right + pos)
}
Here, the beginning of the word is determined by the latest occurance of one of the characters (),.[]; or a blank.
The end of the word is determined by the same characters, however here the first occurance is taken as a delimeter.
Given the original context, the function can the be called using the API method ::lineTextForBufferRow and the desired postion (column) as follows:
const range = getWordAtPosition(textEditor.lineTextForBufferRow(bufferRow), 10)
I am trying to upload a CSV file that has special characters using ServletFileUpload of apache common. But the special characters present in the CSV are being stored as junk characters in the database. The special characters I have are Trademark, registered etc. Following is the code snippet.
ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iter = upload.getItemIterator(request);
while (iter.hasNext()) {
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream stream = item.openStream();
if (item.isFormField()) {
System.out.println("Form field " + name + " with value "
+ Streams.asString(stream, "UTF-8") + " detected.");
}
}
I have tried reading it using BufferendReader, used request.setCharacterEncoding("UTF-8"), tried upload.setHeaderEncoding("UTF-8") and also checked with IOUtils.copy() method, but none of them worked.
Please advice how to get rid of this issue and where it needs to be addressed? Is there anything I need to do beyond servlet code?
Thanks
What database are using? What character set is database using? Characters can be malformed in the database rather than in Java code.
I have a string that at any point may or may not contain one or more / characters. I'd like to be able to create a new string based on this string. The new string would include every character after the very last / in the original string.
Sounds like you're wanting the file name from a URL. In any case, it's the same function. The key is using the InStrRev function to find the first / char, but starting from the right. Here's the function:
Function GetFilename(URL)
Dim I
I = InStrRev(URL, "/")
If I > 0 Then
GetFilename = Mid(URL, I + 1)
Else
GetFilename = URL
End If
End Function
Split it up into parts and get the last part:
a = split("my/string/thing", "/")
wscript.echo a(ubound(a))
note: Not safe when the string is empty.