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@Nullable annotation usage
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It makes it clear that the method accepts null values, and that if you override the method, you should also accept null values.
It also serves as a hint for code analyzers like FindBugs. For example, if such a method dereferences its argument without checking for null first, FindBugs wil...
how to remove untracked files in Git?
... force
-d - directories too
-x - remove ignored files too ( don't use this if you don't want to remove ignored files)
Use with Caution!
These commands can permanently delete arbitrary files, that you havn't thought of at first. Please double check and read all the comments below this answer and the...
What to add for the update portion in ConcurrentDictionary AddOrUpdate
...dio you can only guess the meaning of the 2 parameters. However in the specific case, that @user438331 asks about, I think the solution in my answer using a simple indexer is better.
– Niklas Peter
Sep 26 '15 at 10:33
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Tuning nginx worker_process to obtain 100k hits per min
...worker_rlimit_nofile 20000; # Each connection needs a filehandle (or 2 if you are proxying)
# Total amount of users you can serve = worker_processes * worker_connections
more info: Optimizing nginx for high traffic loads
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How to capitalize the first letter of a String in Java?
... @dutt: No actually, that was perfectly fine too. But Rekin's modification made it perfect. ;)
– Adeel Ansari
Oct 11 '10 at 8:42
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Commit history on remote repository
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Don't you need to specify <refspec> when fetching (or use fetch --all) if you're not tracking any branch on the remote?
– gertvdijk
Dec 18 '12 at 22:04
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Replace input type=file by an image
...case the upload file buttons are just for uploading images ( jpeg|jpg|png|gif ), so I was wondering if I could use a " clickable " image which would act exactly as an input type file (show the dialog box, and same $_FILE on submitted page).
I found some workaround here , and this interesting one...
Do browsers parse javascript on every page load?
...g scenarios where one loads page after
page from the same site, such as different news articles from a news
service, since each page often loads the same, sometimes very large,
script library.
Therefore JavaScript is cached across page reloads, two requests to the same script will not result...
python numpy ValueError: operands could not be broadcast together with shapes
.../docs.scipy.org/doc/numpy/user/basics.broadcasting.html
(Please note that if X and y are of type numpy.matrix, then asterisk can be used as matrix multiplication. My recommendation is to keep away from numpy.matrix, it tends to complicate more than simplify things.)
Your arrays should be fine with...
How to copy from CSV file to PostgreSQL table with headers in CSV file?
...here are about 100 columns in this table, so I do not want to rewrite them if I don't have to.
5 Answers
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