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Cleaner way to update nested structures
.... It turns out that the structure of the zipper is automatically derivable from the original data structure, in a manner that resembles symbolic differentiation of an algebraic expression.
But how does this help you with your Scala case classes? Well, Lukas Rytz recently prototyped an extension to ...
C++, Free-Store vs Heap
...n one
area cannot be safely deallocated in
the other. Memory allocated from the
heap can be used for objects of class
type by placement-new construction and
explicit destruction. If so used, the
notes about free store object lifetime
apply similarly here.
...
Make copy of an array
...
Nice explanation from http://www.journaldev.com/753/how-to-copy-arrays-in-java
Java Array Copy Methods
Object.clone(): Object class provides clone() method and since array
in java is also an Object, you can use this method to achieve f...
How to use my view helpers in my ActionMailer views?
...ailer classes as well. ActionMailer extends ActionController so they come from a common hierarchy. More of a comment on Rails than your solution...
– robbie613
May 12 '13 at 23:34
...
Apply .gitignore on an existing repository already tracking large number of files
...s.
Then run this command:
git rm -r --cached .
This removes everything from the index, then just run:
git add .
Commit it:
git commit -m ".gitignore is now working"
share
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improve this ans...
Bash: infinite sleep (infinite blocking)
... documented in a separate answer. To summarize: infinity is converted in C from "string" to a double. Then that double is truncated to the maximum values allowed timespec, which means a very large amount of seconds (architecture-dependant) but, in theory, finite.
– jp48
...
Can't open config file: /usr/local/ssl/openssl.cnf on Windows [duplicate]
...riables.
NOTE: This can happen when using the OpenSSL binary distribution from Shining Light Productions (a compiled + installer version of the official OpenSSL that is free to download & use). This distribution is "semi-officially" linked from OpenSSL's site as a "service primarily for operati...
Checking Bash exit status of several commands efficiently
...that I use extensively on my Red Hat system. They use the system functions from /etc/init.d/functions to print green [ OK ] and red [FAILED] status indicators.
You can optionally set the $LOG_STEPS variable to a log file name if you want to log which commands fail.
Usage
step "Installing XFS fi...
Scala actors: receive vs react
...is means that the complete thread stack is available and ready to continue from the point of "waiting" on receiving a message.
For example if you had the following code
def a = 10;
while (! done) {
receive {
case msg => println("MESSAGE RECEIVED: " + msg)
}
println...
File being used by another process after using File.Create()
....WriteAllText("c:\test.txt", "all of your content here");
Using the code from your comment. The file(stream) you created must be closed. File.Create return the filestream to the just created file.:
string filePath = "filepath here";
if (!System.IO.File.Exists(filePath))
{
System.IO.FileStream...