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“unadd” a file to svn before commit
...Ok, I guess you and I understand this phrase differently: without deleting all the documents. Unfortunately, svn revert does also delete the newly added changes in the working copy, by restoring the lastest HEAD version. I removed my downvote, but I still feel the warning is important.
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Check for array not empty: any?
..." value in the array evaluates to true.
Similar methods to this are none?, all? and one?, where they all just check to see how many times true could be evaluated. which has nothing to do with the count of values found in a array.
case 1
>> a = []
=> []
>> a.any?
=> false
>> a...
Strip Leading and Trailing Spaces From Java String
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Use String#trim() method or String allRemoved = myString.replaceAll("^\\s+|\\s+$", "") for trim both the end.
For left trim:
String leftRemoved = myString.replaceAll("^\\s+", "");
For right trim:
String rightRemoved = myString.replaceAll("\\s+$", "");
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How to deny access to a file in .htaccess
...nes from the parent).
So you can have:
<Files "log.txt">
Order Allow,Deny
Deny from all
</Files>
For Apache 2.4+, you'd use:
<Files "log.txt">
Require all denied
</Files>
In an htaccess file in your inscription directory. Or you can use mod_rewrite to sort of...
Subset of rows containing NA (missing) values in a chosen column of a data frame
...ated. THe point is to use is.na, I wrongly interpreted you wanted to check all variables.
– Joris Meys
Nov 2 '11 at 21:34
3
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Create a variable name with “paste” in R?
...oss: a <- rnorm(1); a - eval(parse(text=paste(a))) does not return 0 usually.
– user10307643
Oct 7 '19 at 13:31
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Create a submodule repository from a folder and keep its git commit history
...ommit it
git filter-branch --subdirectory-filter <directory 1> -- --all
You should now have a git repository with the files from directory 1 in your repo's root with all related commit history.
Step 4
Create your online repository and push your new repository!
git remote add origin <...
Eclipse: quick search on filename
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Eclipse does provide similar functions:
Open Resource Shift+Ctrl+R for all resource files (including Java files)
Open Type Shift+Ctrl+T for all Java classes in classpath.
They also filter the list as you type.
Note that they search all files of all opened projects in current workspace.
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Select rows which are not present in other table
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There are basically 4 techniques for this task, all of them standard SQL.
NOT EXISTS
Often fastest in Postgres.
SELECT ip
FROM login_log l
WHERE NOT EXISTS (
SELECT -- SELECT list mostly irrelevant; can just be empty in Postgr...
Calculate distance between two latitude-longitude points? (Haversine formula)
...a that the Wikipedia article uses? Is it more efficient and/or more numerically stable?
– musiphil
Dec 20 '12 at 3:47
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