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How to create a protocol with methods that are optional?
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251
From the Apple page on "Formal Protocols":
Optional Protocol
methods can be marked as o...
Why does Dijkstra's algorithm use decrease-key?
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edited Mar 18 '19 at 14:25
answered Feb 13 '12 at 4:39
te...
“Uncaught TypeError: Illegal invocation” in Chrome
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answered Mar 13 '12 at 3:59
NemoyNemoy
3,00711 gold badge1212 silver badges1414 bronze badges
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MySQL: Set user variable from result of query
...ut you need to move the variable assignment into the query:
SET @user := 123456;
SELECT @group := `group` FROM user WHERE user = @user;
SELECT * FROM user WHERE `group` = @group;
Test case:
CREATE TABLE user (`user` int, `group` int);
INSERT INTO user VALUES (123456, 5);
INSERT INTO user VALUES ...
difference between iframe, embed and object elements
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124
<iframe>
The iframe element represents a nested browsing context. HTML 5 standard - "The...
How can I create a copy of an object in Python?
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answered Jan 25 '11 at 13:49
Sven MarnachSven Marnach
446k100100 gold badges833833 silver badges753753 bronze badges
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Java - JPA - @Version annotation
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192
But still I am not sure how it works?
Let's say an entity MyEntity has an annotated version...
How to style the with only CSS?
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EDIT 2015 May
Disclaimer: I've taken the snippet from the answer linked below:
Important Update!
In addition to WebKit, as of Firefox 35 we'll be able to use the appearance property:
Using -moz-appearance with the none valu...
Git branch diverged after rebase
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answered Sep 25 '13 at 23:19
Jason LeBrunJason LeBrun
11.6k22 gold badges3939 silver badges4040 bronze badges
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Is C++14 adding new keywords to C++?
...t explicit noexcept struct void
char32_t export nullptr switch volatile
class extern operator template wchar_t
const false private this ...