There are a number of options, the simplest, of course, being to simply record all versions independently. For a site like Stack Overflow, where posts aren’t usually edited very many times, this is appropriate. However for something like Wikipedia, one needs to be more clever to save space. In the case of Wikipedia, pages are … Read more
It’s an old post but if someone is still looking for it: install git extras brew install git-extras then git summary –line https://github.com/tj/git-extras
Going a little further with nos’s comments, I turned up a scanned version of the GE-635 Programming Manual, and found the following in the section on the macro assembler: The GE-625/635 Macro Assembler is being provided to give the professional programmers some of the conveniences of a compiler and the flexibility of an Assembler. […] … Read more
Only a speculation, but I am afraid it will be hard to be more certain without Bjarne Stroustrup confirming how it really was: It was designed this way because it was assumed such behaviour will be expected by the programmer, that he will expect the copy to be done when = sign is used, and … Read more
The C FAQ has some examples of historical machines with non-0 NULL representations. From The C FAQ List, question 5.17: Q: Seriously, have any actual machines really used nonzero null pointers, or different representations for pointers to different types? A: The Prime 50 series used segment 07777, offset 0 for the null pointer, at least … Read more
Some canonized design patterns — Adapter, Factory, Command, Visitor, etc — are approximations of features which are baked into other languages. Off the top of my head: Event-handlers in C# are baked-in versions of the observer pattern. Think about how you’d wire up events in C# if you had to roll your own observer each … Read more
As Trey Jackson said, you want to put this: (savehist-mode) in your Emacs start up file, then restart Emacs. (Calling it interactively will stomp on your current mini-buffer history, so you may not want to do that.) It’s also worth pointing out that you can persist other variables across sessions by adding them to savehist-additional-variables, … Read more
It looks like a problem in the transcription process. There is a similar problem in DR 42, where the greater than sign is doubled: http://www.open-std.org/jtc1/sc22/wg14/docs/rr/dr_042.html
As far as I know, it is not possible to do what you want. I see this as a bug in bash’s history processing that could be improved. export HISTCONTROL=ignoreboth:erasedups # no duplicate entries shopt -s histappend # append history file export PROMPT_COMMAND=”history -a” # update histfile after every command This will keep the in … Read more
They are based on regular languages.