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What is the difference between self-types and trait subclasses?
...is extended, then you're required to mix-in an A.
When a concrete class finally extends/mixes-in these traits, some class/trait must implement A.
Consider the following examples:
scala> trait User { def name: String }
defined trait User
scala> trait Tweeter {
| user: User =>
...
Viewing a Deleted File in Git
... my working copy. I want to look at the contents of that file, but not actually restore it. How can I do this?
3 Answers
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How to tell if a file is git tracked (by shell exit code)?
...atch (full path + filename), but can be used with wildcards: git ls-files *foo.rb
– dechimp
Apr 26 '19 at 16:57
add a comment
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Why doesn't c++ have &&= or ||= for booleans?
...
all the more reason to have &&= in my opinion. =P
– Kache
Mar 21 '10 at 20:19
4
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Assert equals between 2 Lists in Junit
...t(actual, is(not(expected)));
}
If you have a recent version of Junit installed with hamcrest, just add these imports:
import static org.junit.Assert.*;
import static org.hamcrest.CoreMatchers.*;
http://junit.org/junit4/javadoc/latest/org/junit/Assert.html#assertThat(T, org.hamcrest.Matcher)
http:...
What should my Objective-C singleton look like? [closed]
My singleton accessor method is usually some variant of:
26 Answers
26
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Can I export a variable to the environment from a bash script without sourcing it?
...tioned, is to use source or . to execute the script in the context of the calling shell:
$ cat set-vars1.sh
export FOO=BAR
$ . set-vars1.sh
$ echo $FOO
BAR
Another way is to have the script, rather than setting an environment variable, print commands that will set the environment variable:
$ c...
What do people find difficult about C pointers? [closed]
...duling, actual CPU operations, or assembly-level memory management isn't really required.
When I was teaching, I found the following holes in students' understanding to be the most common source of problems:
Heap vs Stack storage. It is simply stunning how many people do not understand this, even...
How to use a filter in a controller?
...Prashanth is correct, but there is even easier way of doing the same. Basically instead of injecting the $filter dependency and using awkward syntax of invoking it ($filter('filtername')(arg1,arg2);) one can inject dependency being: filter name plus the Filter suffix.
Taking example from the quest...
Git: “Corrupt loose object”
...eone else. Hopefully they will have an uncorrupted version.
You could actually reconstruct it if you can't find a valid version from someone else by guessing at what files should be there. You may want to see if the dates & times of the objects match up to it. Those could be the related blobs. ...