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Why doesn't Java offer operator overloading?
... doesn't perform value copy for reference types, and users can only create new reference types, not value types. So for a user-defined type named Complex, assignment means to copy a reference to an existing value.
Consider instead:
b.set(1, 0); // initialize to real number '1'
a = b;
b.set(2, 0);...
How to assign name for a screen? [closed]
...
To start a new session
screen -S your_session_name
To rename an existing session
Ctrl+a, : sessionname YOUR_SESSION_NAME Enter
You must be inside the session
...
How can I add new array elements at the beginning of an array in Javascript?
...nto the front or back of an existing array; to do so, you need to turn the new element into a single element array:
const array = [ 3, 2, 1 ]
const newFirstElement = 4
const newArray = [newFirstElement].concat(array) // [ 4, 3, 2, 1 ]
concat can also append items. The arguments to concat can be...
How to reset a single table in rails?
... from sqlite_sequence where name = 'table_name'")
I was then able to add new records to my table with the index starting back at 1
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How to get ID of the last updated row in MySQL?
How do I get the ID of the last updated row in MySQL using PHP?
12 Answers
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Open another application from your own (intent)
...e another intent with with category=LAUNCHER, action=MAIN, componentName = new ComponentName(packageName, name) and setFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
Finally, context.startActivity(newIntent)
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ActiveModel::ForbiddenAttributesError when creating new user
... UsersController < ApplicationController
def create
@user = User.new(user_params)
# ...
end
private
def user_params
params.require(:user).permit(:username, :email, :password, :salt, :encrypted_password)
end
end
...
How to create a MySQL hierarchical recursive query
...: use the recursive with syntax.
For MySQL 5.x: use inline variables, path IDs, or self-joins.
MySQL 8+
with recursive cte (id, name, parent_id) as (
select id,
name,
parent_id
from products
where parent_id = 19
union all
select p.id,
...
Why is printing to stdout so slow? Can it be sped up?
...ting to the terminal is going to be slow. Unfortunately short of writing a new terminal implementation I can't really see how you'd speed this up significantly.
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Eclipse: Error “.. overlaps the location of another project..” when trying to create new project
I keep getting an error message in Eclipse when creating a new project.
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