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Generate a random alphanumeric string in Cocoa
I want to call a method, pass it the length and have it generate a random alphanumeric string.
20 Answers
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Is it OK to leave a channel open?
...ose a channel when it is important to tell the
receiving goroutines that all data have been sent. A channel that the
garbage collector determinies to be unreachable will have its
resources reclaimed whether or not it is closed. (Don't confuse this
with the close operation for open files. It ...
Running bash script from within python
...ep.sh" to "./sleep.sh".)
The shell=True parameter is not needed (under a Posix system like Linux) if the first line of the bash script is a path to a shell; for example, #!/bin/bash.
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Create a GUID in Java
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@angel Yes, it is theoretically possible for the UUID.randomUUID method to return a duplicate, but this is not at all a realistic concern. The Oracle/OpenJDK implementation uses a cryptographically-strong random number generator. Given that, and given ...
How can I extract embedded fonts from a PDF as valid font files?
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You have several options. All these methods work on Linux as well as on Windows or Mac OS X. However, be aware that most PDFs do not include to full, complete fontface when they have a font embedded. Mostly they include just the subset of glyphs used ...
What is the difference between new/delete and malloc/free?
What is the difference between new / delete and malloc / free ?
15 Answers
15
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Increasing (or decreasing) the memory available to R processes
... the error that R
has run out of memory.
If you have R already installed and
subsequently install more RAM, you may
have to reinstall R in order to take
advantage of the additional capacity.
You may also set the amount of
available memory manually. Close R,
then right-click o...
Xcode suddenly stopped running project on hardware: “Could not launch xxx.app: .. No such file..” [c
...tarted directly after I deleted it from the device and attempted to re-install by rerunning it in Xcode (something I've done hundreds of times before).
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What happens to a declared, uninitialized variable in C? Does it have a value?
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In practice, they tend to just have some nonsensical value in there initially - some compilers may even put in specific, fixed values to make it obvious when looking in a debugger - but strictly speaking, the compiler is free to do anything from crashing to summoning demons through your nasal pass...
Import CSV to SQLite
...l data. If that's the case with your CSV file, then you do not need to manually create the table using the create table command. The .import command will use the first line in your file to determine the column names and create the table accordingly. You still have to include the name of the table in...