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What is the meaning of “__attribute__((packed, aligned(4))) ”
... some meaningless bytes between the end of the last data structure and the start of the next, which is data structure padding.
gcc provides functionality to disable structure padding. i.e to avoid these meaningless bytes in some cases. Consider the following structure:
typedef struct
{
char...
In ASP.NET, when should I use Session.Clear() rather than Session.Abandon()?
...t session, and causes a new session to be created thus causing the End and Start events to fire.
4 Answers
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What CSS selector can be used to select the first div within another div
...s if doctype is specified. In my defence, I wouldn't be surprised if stuff started working in IE if you'd type <the_cake_is_a_lie> at the top of the file ...
– Valentin Flachsel
Sep 19 '10 at 21:55
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PHP function overloading
...------------------------------------------
#> 5. create your object
// Start
$t = new test;
#> 6. Call your method
// Call first method with no args:
$t->func();
// Output: func(void)
$t->func($val);
// Output: func(integer 10)
$t->func("hello");
// Output: func(string hello)
$...
Bash if [ false ] ; returns true
...strings. [[ x ]] is equivalent to [[ -n x ]] for any string x that doesn't start with a hyphen. bash doesn't have any Boolean constants in any context. Strings that look like integers are treated as such inside (( ... )) or with operators such as -eq or -lt inside [[ ... ]].
– ...
Convert Python dictionary to JSON array
...odeDecodeError: 'utf8' codec can't decode byte 0xff in position 0: invalid start byte
Ultimately you can't store raw bytes in a JSON document, so you'll want to use some means of unambiguously encoding a sequence of arbitrary bytes as an ASCII string - such as base64.
>>> import json
>...
What is the “right” way to iterate through an array in Ruby?
..., but don't worry, you can get by without knowing all of them. But as you start to learn and use the different methods, your code will become cleaner and clearer, and you'll be on your way to Ruby mastery.
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PHP's array_map including keys
... without splitting the keys and values. Using the function supplied at the start of this answer:
$test_array = ["first_key" => "first_value",
"second_key" => "second_value"];
$array_map_assoc = function (callable $f, array $a) {
return array_column(array_map($f, array_keys(...
How to define different dependencies for different product flavors
... the xxxCompile closures Gradle generates will not work if the flavor name starts with a capital letter.
– Jarett Millard
Jan 21 '15 at 17:44
2
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How to Create Deterministic Guids
...hat the original poster is after. UUID already has an algorithm for you to start with a string and convert it into a GUID. UUID version 3 hashes the string with MD5, while version 5 hashes it with SHA1. The important point in creating a "guid" is to makes it "unique" against other GUIDs. The algorit...