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How to override equals method in Java
...lasses.
There is no need for the class to provide a “logical equality” test. For example, java.util.regex.Pattern could have overridden equals to check whether two Pattern instances represented exactly the same regular expression, but the designers didn’t think that clients would need or want ...
What's the best way to use R scripts on the command line (terminal)?
...he #! line:
#!/usr/bin/R --random --switches --f
Not knowing R, I can't test properly, but this seems to work:
axa@artemis:~$ cat r.test
#!/usr/bin/R -q -f
error
axa@artemis:~$ ./r.test
> #!/usr/bin/R -q -f
> error
Error: object "error" not found
Execution halted
axa@artemis:~$
...
How do I convert an HttpRequestBase into an HttpRequest object?
...ike mentioned in ASP.NET: Removing System.Web Dependencies for better unit testing support.
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IF statement: how to leave cell blank if condition is false (“” does not work)
...
Well, the problem for me is not the results of the "blank test" per say, but rather the following: I apply the if statement to a whole row, and then I would like to use Go To -> Special -> Blanks to delete the blank cells from the row, i.e. the cells for which the condition wa...
How do I force Postgres to use a particular index?
... a particular query plan for all time.
As a very blunt hammer, useful for testing, you can use the enable_seqscan and enable_indexscan parameters. See:
Examining index usage
enable_ parameters
These are not suitable for ongoing production use. If you have issues with query plan choice, you shou...
How can I list ALL DNS records?
...$2"; shift 2 ;;
*) break ;;
esac; done
DOM="$1"; shift
TYPE="${1:-any}"
test "${NS:-}" || NS=$(dig +short SOA "$DOM" | awk '{print $1}')
test "$NS" && NS="@$NS"
if test "$EXTENDED"; then
dig +nocmd $NS "$DOM" +noall +answer "$TYPE"
wild_ips=$(dig +short "$NS" "*.$DOM" "$TYPE" | tr '...
Regex to match string containing two names in any order
...
You can do checks using lookarounds:
^(?=.*\bjack\b)(?=.*\bjames\b).*$
Test it.
This approach has the advantage that you can easily specify multiple conditions.
^(?=.*\bjack\b)(?=.*\bjames\b)(?=.*\bjason\b)(?=.*\bjules\b).*$
...
Load local JSON file into variable
...
TLDR; the caching hit him in unit tests and so he gives a helper function to avoid caching (ping @nono).
– Ehvince
Mar 18 '18 at 23:41
...
eval command in Bash and its typical uses
... Take this (contrived) example:
# activate.sh
echo 'I got activated!'
# test.py
print("export foo=bar/baz/womp")
print(". activate.sh")
$ eval $(python test.py)
bash: export: `.': not a valid identifier
bash: export: `activate.sh': not a valid identifier
$ eval "$(python test.py)"
I got activate...
Batch equivalent of Bash backticks
...scripts with the for /f command:
for /f "usebackq tokens=*" %%a in (`echo Test`) do my_command %%a
Yeah, it's kinda non-obvious (to say the least), but it's what's there.
See for /? for the gory details.
Sidenote: I thought that to use "echo" inside the backticks in a "for /f" command would nee...