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In plain English, what does “git reset” do?
...s merged. In general, merges can actually have arbitrarily many parents (octopus merges).
The ^ and ~ operators can be strung together, as in HEAD~3^2, the second parent of the third-generation ancestor of HEAD, HEAD^^2, the second parent of the first parent of HEAD, or even HEAD^^^, which is equiva...
Is git's semi-secret empty tree object reliable, and why is there not a symbolic name for it?
...you:
(See the tree SHA1?)
You can even rebase your existing history on top of that empty commit (see "git: how to insert a commit as the first, shifting all the others?")
In both cases, you don't rely on the exact SHA1 value of that empty tree.
You simply follow a best practice, initializing yo...
What is the difference between a 'closure' and a 'lambda'?
...ow the current misconceptions were created. This answer needs to go to the top.
– Sharky
Jun 13 '16 at 14:32
...
Why is the order in dictionaries and sets arbitrary?
...ython's hash set is stored in memory and
How numbers get hashed
From the top:
A hash set is a method of storing random data with really fast lookup times.
It has a backing array:
# A C array; items may be NULL,
# a pointer to an object, or a
# special dummy object
_ _ 4 _ _ 2 _ _ 6
We shall i...
Clang optimization levels
... showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg cla...
Canvas width and height in HTML5
...space-between;
height: 100vh;
}
.left {
width: 70%;
left: 0;
top: 0;
right: 0;
bottom: 0;
}
canvas {
width: 100%;
height: 100%;
}
pre {
padding: 1em;
}
.slider {
width: 10px;
background: #000;
}
.right {
flex 1 1 auto;
}
<div class="frame">
...
What's the best way to communicate between view controllers?
...d that, I always prefer to do my coordination (#2) via model objects. The top-level view controller loads or creates the models it needs, and each view controller sets properties in its child controllers to tell them which model objects they need to work with. Most changes are communicated back up...
Why does base64 encoding require padding if the input length is not divisible by 3?
...ys completed at the end of a message.
It does not suggest concatenation (top answer here), nor ease of implementation as an explicit purpose for the padding. However, considering the entire description, it is not unreasonable to assume that this may have been intended to help the decoder read the ...
Using a piano keyboard as a computer keyboard [closed]
...otype machine to keep up with people talking for hours in a row, when even top-flight typists wouldn't be able to for any length of time via normal typewriter-style keyboards. As with machine stenography, you'd need a "dictionary" of the meanings of chords and sequences of chords. (Can you tell I us...
What is “rvalue reference for *this”?
... function (or operator) is called on.)
Let's take the first example at the top of this post. After the aforementioned transformation, the overload-set looks something like this:
void f1(test&); // will only match lvalues, linked to 'void test::f() &'
void f2(test&&); // will only mat...