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Remove a string from the beginning of a string
... came in at .17 sec, whereas (substr($str, 0, strlen($prefix)) == $prefix) from the accepted answer was more like .37
– billynoah
Jul 31 '15 at 5:33
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How to grant remote access permissions to mysql server for user?
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This grants root access with the same password from any machine in *.example.com:
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%.example.com'
IDENTIFIED BY 'some_characters'
WITH GRANT OPTION;
FLUSH PRIVILEGES;
If name resolution is not going to work, you may also ...
Remove insignificant trailing zeros from a number?
...ave I missed a standard API call that removes trailing insignificant zeros from a number?
15 Answers
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Need a simple explanation of the inject method
...alues in the array, or 10.
Here's another simple example to create a hash from an array of objects, keyed by their string representation:
[1,"a",Object.new,:hi].inject({}) do |hash, item|
hash[item.to_s] = item
hash
end
In this case, we are defaulting our accumulator to an empty hash, then p...
Flask-SQLAlchemy import/context issue
... with the app right away - you can do this instead:
# apps.members.models
from flask_sqlalchemy import SQLAlchemy
db = SQLAlchemy()
class Member(db.Model):
# fields here
pass
And then in your application setup you can call init_app:
# apps.application.py
from flask import Flask
from ap...
What belongs in an educational tool to demonstrate the unwarranted assumptions people make in C/C++?
...&var.int2-&var.int1, &var.int1+diff==&var.int2)' is false.
From what I can say with my puny test cases, you are Stop at 0x0013f3: (106) Invalid instruction 0x00dd
printf crashes. "O_O"
gcc 4.4@x86_64-suse-linux
We like to think that:
..05 int has the size of pointers
but 'sizeo...
How to connect to Mysql Server inside VirtualBox Vagrant?
...sure MySQL binds to 0.0.0.0 and not 127.0.0.1 or it will not be accessible from outside the machine
You can ensure this by editing your my.conf file and looking for the bind-address item--you want it to look like bind-address = 0.0.0.0. Then save this and restart mysql:
sudo service mysql restart...
How to remove a field from params[:something]
...l so use with more care!
Original Answer
You can remove a key/value pair from a Hash using Hash#delete:
params.delete :company
If it's contained in params[:user], then you'd use this:
params[:user].delete :company
sha...
Understand convertRect:toView:, convertRect:FromView:, convertPoint:toView: and convertPoint:fromVie
...our example above is pointless (no pun intended) since it converts a point from a view to itself, so nothing will happen. You would more commonly find out where some point of a view was in relation to its superview - to test if a view was moving off the screen, for example:
CGPoint originInSupervie...
How do you detect where two line segments intersect? [closed]
...uct v × w to be vx wy − vy wx.
Suppose the two line segments run from p to p + r and from q to q + s. Then any point on the first line is representable as p + t r (for a scalar parameter t) and any point on the second line as q + u s (for a scalar parameter u).
The two line...