I'm separating a filepath string into two separate strings:
filepath with just directories (filename removed)
filename
I'd like to work within a CPS context, which prevents some closure usage. I've got the following working code, but I'm unsure if it is good practice. The filepath references an "ID Version" file named 'idver.h.' 'projectPaths' is a map containing the filepath.
//pull off the filename from end of filepath
String[] idVerPathArray = projectPaths.idVerPath.split('/')
String filename = idVerPathArray.last()
//get subarray without last element
String[] idVerJustPathArray = Arrays.copyOfRange(idVerPathArray, 0, idVerPathArray.length - 1)
String idVerJustPath = idVerJustPathArray.join('/')
def file = new File(projectPaths.idVerPath)
String filename = file.name
String idVerJustPath = file.parent
Related
I need to get the name of an image path, which is a String. How could i say programmatically in dart "when you find the first / from the right hand side split it, then give it to me"?
the string which i need to split is:
'/data/data/com.example.trail/cache/IMG_1645484057312.png'
You can use split like the #scott-deagan answer for it. But if you intend to support cross-platform path manipulation, you need to use path package.
Example:
import 'package:path/path.dart' as p;
void main() {
var filepath = '/data/data/com.example.trail/cache/IMG_1645484057312.png';
print(p.basename(filepath));
print(p.basenameWithoutExtension(filepath));
}
result:
IMG_1645484057312.png
IMG_1645484057312
void main() {
var someFile = '/data/data/com.example.trail/cache/IMG_1645484057312.png';
var fname = someFile.split('/').last;
var path = someFile.replaceAll("/$fname", '');
print(fname);
print(path);
}
Here is the way I recommend you to test
First, do the split on the original string by "/" splitter, then extract the last member of the list created by the splitter to get the name of the png file.
Second, for extracting the remaining string (i.e. the file path), use the substring method of the class string. just by subtracting the original string length from the last_member length in the previous portion, you are able to get the file path string.
Hope to be useful
Bests
void main() {
String a = '/data/data/com.example.trail/cache/IMG_1645484057312.png';
var splited_a = a.split('/');
var last_image_index = splited_a.last;
String remaining_string = a.substring(0, a.length - last_image_index.length);
print(remaining_string);
print(last_image_index);
}
result:
the result of path and file extraction from a string in dart
If I have a string like this.
local string = "D:/Test/Stuff/Server/resources/[Test]/SuperTest"
How would I remove everything after the word "server" so it will end up look like this
local string = "D:/Test/Stuff/Server"
use str instead of string to not shadow the real string library
local str = "D:/Test/Stuff/Server/resources/[Test]/SuperTest"
here a solution
str = str:match("(.*Server)")
or use do...end to avoid shadowing
do
local string = ("D:/Test/Stuff/Server/resources/[Test]/SuperTest"):match("(.*Server)")
end
I request you to give me a solution where the result of NSString and String both are same
downloadedFile = MOM'&^*%s-HC.pdf (In NSString)
let path = pathComponent.appendingPathComponent(downloadedFile as String)
print(path) //OutPut: ttt_gmail_com/MOM'&%5E*%25s-HC-2.pdf
If I test with regular expression result is OK.
let NSStringValue = "MOM'&^*%s-HC.pdf" as NSString
print(NSStringValue) // Output: MOM'&^*%s-HC.pdf
let StringValue = downloadedFile as String
print(StringValue) // Output: MOM'&^*%s-HC.pdf
but while I put that code in appendingPathComponent it changes my result.
You have a file name which has all the special characters here, I tried your case in a sample project trying to load such file in UIDocumentInteractionController and it seems when I have a file name with special character in my document directory and i try to retrieve it, few special characters are URL encoded.
Observe the file name I used here is "MOM'&^*%s-HC.pdf" and saved it in the doc directory but when I retrieve it from the document directory using the following code few characters are URL encoded as I am fetching the path as URL.
So this means that your original file name
MOM'&^*%s-HC.pdf
is now alterated and replaced by percentage escape sequence strings,
MOM'&%5E*%25s-HC.pdf
observe the below code which I used
var pdfURL = (FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)).last! as URL
pdfURL = pdfURL.appendingPathComponent(fileName)
To resolve this all i did was removed the percentage escape sequence when I am creating the URL and it worked I was able to view the PDF in the UIDocumentInteractionController
fileName.removingPercentEncoding!
Hope it helps.
How can I make this:
var originalString = "http://name.domain.com/image.jpg"
becomes this:
originalString = "http://name.domain.com/image_new.jpg"
I could not find any document about the new Range<String.Index> in Swift.
This is not a problem in Obj-C, but without any reference about Range, it suddenly becomes so confusing.
Thanks.
Edit:
Well, thanks for these solutions. However, let me give you more details about this question.
After uploading an image to server, it responds back with a String link, like above, and the image name is a random string.
The server also generates different versions of uploaded image (like Flickr). In order to get these images, I have to append a suffix into image name, it looks like this:
originalString = "http://image.domain.com/randomName_large.jpg" or "http://image.domain.com/randomName_medium.jpg"
So that's why I need to insert a String into another String. My solution is find the first . by scan the link backwardly and append a suffix before it, but the new Range<String.Index> makes it confusing.
There are some nice and useful methods on NSString that you should be able to use:
let originalString: NSString = "http://name.domain.com/image.jpg"
let extension = originalString.pathExtension // "jpg"
let withoutExt = originalString.stringByDeletingPathExtension() // "http://name.domain.com/image"
let imageName = withoutExt.lastPathComponent // "image"
let withoutFilename = withoutExt.stringByDeletingLastPathComponent() // "http://name.domain.com/"
let newString = withoutFilename
.stringByAppendingPathComponent("\(imageName)_new")
.stringByAppendingPathExtension(extension)
I only typed this into the browser (it's untested) but it should give you an idea...
This can be done with String manipulation functions. But what if the string
is
var originalString = "http://images.domain.com/image.jpg"
? You probably do not want to replace the first or all occurrences of the string
"image" here.
A better tool for this purpose might be NSURLComponents, which lets you
modify all components of a URL separately:
var originalString = "http://name.domain.com/image.jpg"
let urlComps = NSURLComponents(string: originalString)!
urlComps.path = "/image_new.jpg"
originalString = urlComps.URL!.absoluteString!
println(originalString) // http://name.domain.com/image_new.jpg
Why not using string interpolation?
var imageName = "image_new"
originalString = "http://images.domain.com/\(imageName).jpg"
I have stored Database in the main folder of my project, I am using Relative Path while i use that database. Now i need to convert this realtive path into absolute path at runtime
I used tha following code but it doesnt work
string Path1 = #"Data Source=|DataDirectory|\MakeMyBill.sdf";
string fullpath=Path.GetFullPath(Path1);
You can do:
String absolutePath = Server.MapPath(myRelativePath);
try like HostingEnvironment
string logDirectory = HostingEnvironment.MapPath("~") + "\\" + "App_Data\\MakeMyBill.sdf";
or
string logDirectory =Server.MapPath("~/App_Data/MakeMyBill.sdf")
or on any folder
string filePath = #"D:\file\";
string directoryName = Path.GetDirectoryName(filePath);
filePath = directoryName + #"\file.xml";