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How do I check if a C++ std::string starts with a certain string, and convert a substring to an int?
....rfind("titi") returns 2 so when compared against == 0 would return false) and it would be inefficient (looking through the whole string instead of just the start). But it does not do that because it passes the pos parameter as 0, which limits the search to only match at that position or earlier. Fo...
C++ IDE for Macs [closed]
I teach a C++ course using Visual Studio. One of my students has a Mac and was looking for an IDE to use on his machine. What would be good to recommend?
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Cannot kill Python script with Ctrl-C
...thread, but because your threads aren't in daemon mode, they keep running, and that keeps the process alive. We can make them daemons:
f = FirstThread()
f.daemon = True
f.start()
s = SecondThread()
s.daemon = True
s.start()
But then there's another problem - once the main thread has started your ...
How to disable “Save workspace image?” prompt in R?
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You can pass the --no-save command line argument when you start R, or you can override the q function:
utils::assignInNamespace(
"q",
function(save = "no", status = 0, runLast = TRUE)
{
.Internal(quit(save, status, runLast))
},
"base"
)
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Get an OutputStream into a String
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I would use a ByteArrayOutputStream. And on finish you can call:
new String( baos.toByteArray(), codepage );
or better:
baos.toString( codepage );
For the String constructor, the codepage can be a String or an instance of java.nio.charset.Charset. A possib...
How to move a git repository into another directory and make that directory a git repository?
... cp -r gitrepo1 newrepo
# remove .git from old repo to delete all history and anything git from it
$ rm -rf gitrepo1/.git
Note that the copy is quite expensive if the repository is large and with a long history. You can avoid it easily too:
# move the directory instead
$ mv gitrepo1 newrepo
# m...
How to check for a valid Base64 encoded string
...to see if a string is Base 64 encoded other than just trying to convert it and see if there is an error? I have code code like this:
...
How to draw a line in android
Can anybody tell how to draw a line in Android, perhaps with an example?
15 Answers
1...
How can I convert my Java program to an .exe file? [closed]
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javapackager
The Java Packager tool compiles, packages, and prepares Java and JavaFX applications for distribution. The javapackager command is the command-line version.
– Oracle's documentation
The javapackager utility ships with the JDK. It can generate .exe files with the -n...
Is Java Regex Thread Safe?
I have a function that uses Pattern#compile and a Matcher to search a list of strings for a pattern.
5 Answers
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