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Convert light frequency to RGB?
...g a good example) because you cannot "make" arbitrary colours of light by adding three primary colours together, whatever our physics teachers may have told us (well mine did). Too bad, but in practice not usually fatal.
– Francis Davey
May 29 '10 at 22:58
...
Break a previous commit into multiple commits
...directory: git status should show no pending modifications, deletions, or additions.
Now, you have to decide which commit(s) you want to split.
A) Splitting the most recent commit
To split apart your most recent commit, first:
$ git reset HEAD~
Now commit the pieces individually in the usual w...
Meaning of @classmethod and @staticmethod for beginner? [duplicate]
...e information coming from an outer source encoded as a string with format 'dd-mm-yyyy'. Suppose we have to do this in different places in the source code of our project.
So what we must do here is:
Parse a string to receive day, month and year as three integer variables or a 3-item tuple consisti...
How do you convert a byte array to a hexadecimal string, and vice versa?
...esents a byte array must have an even character count. A 0 should not be added anywhere - to add one would be making an assumption about invalid data that is potentially dangerous. If anything, the StringToByteArray method should throw a FormatException if the hex string contains an odd number of ...
How to avoid reinstalling packages when building Docker image for Python projects?
... a Dockerfile which looks something like this:
FROM my/base
WORKDIR /srv
ADD ./requirements.txt /srv/requirements.txt
RUN pip install -r requirements.txt
ADD . /srv
RUN python setup.py install
ENTRYPOINT ["run_server"]
Docker will use cache during pip install as long as you do not make any change...
Java 8: Lambda-Streams, Filter by Method with Exception
... being essential for lambda method chaining, so I hope one day it will be added to one of the popular libs or this propagating behavior would be by default.
public class PropagateExceptionsSample {
// a simplified version of Throwables#propagate
public static RuntimeException runtime(Throwa...
Can I split an already split hunk with git?
I've recently discovered git's patch option to the add command, and I must say it really is a fantastic feature.
I also discovered that a large hunk could be split into smaller hunks by hitting the s key, which adds to the precision of the commit.
But what if I want even more precision, if the...
A complete solution to LOCALLY validate an in-app receipts and bundle receipts on iOS 7
...container. Others apparently have done it purely with system frameworks.
Adding OpenSSL to your project is not trivial. The RMStore wiki should help.
If you opt to use OpenSSL to open the PKCS7 container, your code could look like this. From RMAppReceipt:
+ (NSData*)dataFromPKCS7Path:(NSString*...
How do you fix a bad merge, and replay your good commits onto a fixed merge?
...ge
git checkout -b tmpfix <sha1-of-merge>
# remove the incorrectly added file
git rm somefile.orig
# commit the amended merge
git commit --amend
# go back to the master branch
git checkout master
# replant the master branch onto the corrected merge
git rebase tmpfix
# delete the temporary...
What do 'real', 'user' and 'sys' mean in the output of time(1)?
... of such an action might be manipulation of the MMU to gain access to the address space of another process. Normally, user-mode code cannot do this (with good reason), although it can request shared memory from the kernel, which could be read or written by more than one process. In this case, the ...