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jQuery first child of “this”
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I've added jsperf test to see the speed difference for different approaches to get the first child (total 1000+ children)
given, notif = $('#foo')
jQuery ways:
$(":first-child", notif) - 4,304 ops/sec - fastest
notif.children(":first") - 653 ...
Does git return specific return error codes?
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I set-up a test to fail. This is what I got:
$ git merge newbranch
Auto-merging test.txt
CONFLICT (content): Merge conflict in test.txt
Automatic merge failed; fix conflicts and then commit the result.
$ echo $?
1
Git returns 0 when...
Returning a boolean from a Bash function
...[[ -n $1 ]] ; then
return 0
else
return 1
fi
}
#Test
if is_directory $1 ; then
echo "Directory exist"
else
echo "Directory does not exist!"
fi
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How to remove spaces from a string using JavaScript?
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SHORTEST and FASTEST: str.replace(/ /g, '');
Benchmark:
Here my results - (2018.07.13) MacOs High Sierra 10.13.3 on Chrome 67.0.3396 (64-bit), Safari 11.0.3 (13604.5.6), Firefox 59.0.2 (64-bit) ):
SHORT strings
Short string simi...
Generic method multiple (OR) type constraint
...ible. You can, however, define overloads for specific types:
public void test(string a, string arg);
public void test(string a, Exception arg);
If those are part of a generic class, they will be preferred over the generic version of the method.
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What's the best way to use R scripts on the command line (terminal)?
...he #! line:
#!/usr/bin/R --random --switches --f
Not knowing R, I can't test properly, but this seems to work:
axa@artemis:~$ 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:~$
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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)
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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 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 ...
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...