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Why does Java's hashCode() in String use 31 as a multiplier?
... for 31 since 33 is not a prime:
Of the remaining
four, I'd probably select P(31), as it's the cheapest to calculate on a RISC
machine (because 31 is the difference of two powers of two). P(33) is
similarly cheap to calculate, but it's performance is marginally worse, and
33 is composit...
Setting the correct encoding when piping stdout in Python
...ion is to change sys.stdout at the start of your program, to encode with a selected encoding. Here is one solution I found on Python: How is sys.stdout.encoding chosen?, in particular a comment by "toka":
import sys
import codecs
sys.stdout = codecs.getwriter('utf8')(sys.stdout)
...
How do I retrieve my MySQL username and password?
...art the MySQL console client with the -u root option.
List all the users;
SELECT * FROM mysql.user;
Reset password;
UPDATE mysql.user SET Password=PASSWORD('[password]') WHERE User='[username]';
But DO NOT FORGET to
Stop the MySQL process
Start the MySQL Process normally (i.e. without the --ski...
SVN+SSH, not having to do ssh-add every time? (Mac OS)
...e is a -K flag on OS X for ssh-add. Additional to that, this should be the selected answer.
– kaiser
Dec 8 '15 at 13:54
1
...
“Connection for controluser as defined in your configuration failed” with phpMyAdmin in XAMPP
... a file called create_tables.sql. Open it in a text editor.
In phpMyAdmin, select the phpmyadmin database and click on the "SQL" tab.
Copy/paste the entire text from create_tables.sql into the text box, and run the query.
Open the config.inc.php file in the phpMyAdmin install directory, and add the ...
Placeholder Mixin SCSS/CSS
...nnested:
@mixin optional-at-root($sel) {
@at-root #{if(not &, $sel, selector-append(&, $sel))} {
@content;
}
}
@mixin placeholder {
@include optional-at-root('::-webkit-input-placeholder') {
@content;
}
@include optional-at-root(':-moz-placeholder') {
@content;
}
...
moving committed (but not pushed) changes to a new branch after pull
...- is desirable branch
git fetch && git checkout branch1
git log
select commit ids that you need to move
git fetch && git checkout branch2
git cherry-pick commit_id_first..commit_id_last
git push
Now revert unpushed commits from initial branch
git fetch && git checkout ...
How can I override Bootstrap CSS styles?
...yles in the future. That leaves us with CSS priorities.
Basically, every selector has its own numerical 'weight':
100 points for IDs
10 points for classes and pseudo-classes
1 point for tag selectors and pseudo-elements
Note: If the element has inline styling that automatically wins (1000 points...
What is the difference between “expose” and “publish” in Docker?
...col are optional, if not a public port is specified, a random port will be selected on host by docker to expose the specified container port on Dockerfile.
A good pratice is do not specify public port, because it limits only one container per host ( a second container will throw a port already in u...
Parsing JSON with Unix tools
...s is format the JSON, if I'm not mistaken. It does not allow the caller to select a particular field from the output, as would an xpath solution, or something based on "JSON Pointer".
– Cheeso
Jun 4 '14 at 0:42
...