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Semicolons superfluous at the end of a line in shell scripts?
... agree with jvriesem's questions & comments, the docs snippet seems a bit too narrow
– grgry
Jul 11 '18 at 23:55
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Why does the PHP json_encode function convert UTF-8 strings to hexadecimal entities?
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The following code is for Version 5.3.
UPDATED
html_entity_decode is a bit more efficient than pack + mb_convert_encoding.
(*SKIP)(*FAIL) skips backslashes itself and specified characters by JSON_HEX_* flags.
function raw_json_encode($input, $flags = 0) {
$fails = implode('|', array_fi...
Determining complexity for recursive functions (Big O notation)
...4, even though the result is the same, shouldn't the induction be the following? T(n) = a + 2T(n-1) = a + 2a + 4T(n-1) = 3a + 4a + 8T(n-1) = a * (2^n - 1) + 2^n * T(0) = a * (2^n - 1) + b * 2^n = (a + b) * 2^n - a = O(2^n)
– Snowfish
Jan 3 at 22:59
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Any reason why scala does not explicitly support dependent types?
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Miles, thanks for this very detailed answer. I'm a bit curious about one thing, though. None of your examples seem at first glance particularly impossible to express in Haskell; are you then claiming that Haskell is also a dependently-typed language?
– J...
How to scale a UIImageView proportionally?
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I've seen a bit of conversation about scale types so I decided to put together an article regarding some of the most popular content mode scaling types.
The associated image is here:
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Get a specific bit from byte
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Easy. Use a bitwise AND to compare your number with the value 2^bitNumber, which can be cheaply calculated by bit-shifting.
//your black magic
var bit = (b & (1 << bitNumber-1)) != 0;
EDIT: To add a little more detail becaus...
What do people find difficult about C pointers? [closed]
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I suspect people are going a bit too deep in their answers. An understanding of scheduling, actual CPU operations, or assembly-level memory management isn't really required.
When I was teaching, I found the following holes in students' understanding to ...
Difference between >>> and >>
...ht, >>> is logical shift right.
In an arithmetic shift, the sign bit is extended to preserve the signedness of the number.
For example: -2 represented in 8 bits would be 11111110 (because the most significant bit has negative weight). Shifting it right one bit using arithmetic shift wo...
How to work around the lack of transactions in MongoDB?
...pplications that take in a tremendous amount of data is to just tolerate a bit of inconsistency. An example would, if we're talking about a friend feed in Facebook, it doesn't matter if everybody sees your wall update simultaneously. If okey, if one person's a few beats behind for a few seconds and ...
live output from subprocess command
...ost one subprocess.PIPE, otherwise it's hard.
It may be time to explain a bit about how subprocess.Popen does its thing.
(Caveat: this is for Python 2.x, although 3.x is similar; and I'm quite fuzzy on the Windows variant. I understand the POSIX stuff much better.)
The Popen function needs to de...