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Convert RGB to RGBA over white
... @templatetypedef: Converting te lowest component to alpha is scaling from the range 0..255 to 0..1, and inverting. Using 1.0 - 152 / 255 would also work. Converting the color components is simply scaling from n..255 to 0..255 where n is the lowest component.
– Guffa
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Uninstall Node.JS using Linux command line?
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If you installed from source, you can issue the following command:
sudo make uninstall
If you followed the instructions on https://github.com/nodejs/node/wiki to install to your $HOME/local/node, then you have to type the following before ...
How do I adjust the anchor point of a CALayer, when Auto Layout is being used?
...aints affecting it. Unfortunately this typically causes the view to vanish from the screen, since autolayout still takes place, and now there are no constraints to tell us where to put the view. So in addition to removing the constraints, I set the view's translatesAutoresizingMaskIntoConstraints to...
O(nlogn) Algorithm - Find three evenly spaced ones within binary string
... if there exists any other pair (a,c), then the coefficient is at least 3, from (a,c) and (c,a). For the example above, we have the coefficient of x10 to be 3 precisely because of the AP (2,5,8). (These coefficients x2b will always be odd numbers, for the reasons above. And all other coefficients in...
Why is conversion from string constant to 'char*' valid in C but invalid in C++
...https%3a%2f%2fstackoverflow.com%2fquestions%2f20944784%2fwhy-is-conversion-from-string-constant-to-char-valid-in-c-but-invalid-in-c%23new-answer', 'question_page');
}
);
Post as a guest
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How to cherry pick from 1 branch to another
...t cherry-pick -x <sha>
then at least you'll get the commit message from the original commit appended to your new commit, along with the original SHA, which is very useful for tracking cherry-picks.
share
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How to obtain the query string from the current URL with JavaScript?
...ry.makeString( object, [addQuestionMark] )'
// which returns a queryString from an object. An optional boolean parameter can be
// used to toggle a leading question mark.
// -------------------------------------------------------------------------------------
if (!window.location.query) {
window...
Jenkins Host key verification failed
...erated
4) go to --> cat /var/lib/jenkins/.ssh/id_rsa.pub
5) Copy key from id_rsa.pub
6)Exit from bash
7) ssh@yourrepository
8) vi .ssh/authorized_keys
9) Paste the key
10) exit
11)Manually login to mercurial server
Note: Pls do manually login otherwise jenkins will again give error "hos...
How do I use method overloading in Python?
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You can also use pythonlangutil:
from pythonlangutil.overload import Overload, signature
class A:
@Overload
@signature()
def stackoverflow(self):
print 'first method'
@stackoverflow.overload
@signature("int")
def stackov...
What is the purpose of Rank2Types?
...System F directly, because Haskell is designed to hide the details of that from you in the interest of simplicity.
But basically, the rough idea is that polymorphic types don't really have the a -> b form that they do in Haskell; in reality, they look like this, always with explicit quantifiers:...