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how to solve “ruby installation is missing psych” error?
...ven though it was successfully installed, it complained about libyaml. and now every time i wanna install a gem (say rails) this warning shows up:
...
Best way to use multiple SSH private keys on one client
...File ~/.ssh/private_ssh_file
User username-on-remote-machine
Now you can connect using the friendly-name:
ssh friendly-name
More keywords can be found on the OpenSSH man page. NOTE: Some of the keywords listed might already be present in your /etc/ssh/ssh_config file.
...
What are -moz- and -webkit-? [duplicate]
...o explicitly looking to turn on new features. Incidentally, so far as you know, is it a single flag to to turn on all experimental features, or a checklist to turn on individual features one-by-one?
– David says reinstate Monica
Aug 6 '13 at 14:47
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Is there a performance difference between i++ and ++i in C++?
...ent translation units. Compiler with g++ 4.5.
Ignore the style issues for now
// a.cc
#include <ctime>
#include <array>
class Something {
public:
Something& operator++();
Something operator++(int);
private:
std::array<int,PACKET_SIZE> data;
};
int main () {
S...
How can I make a weak protocol reference in 'pure' Swift (without @objc)
...
What's the correct way of doing weak delegates now in Swift? Apple documentation is not showing or declaring the delegate as weak in their example code: developer.apple.com/library/ios/documentation/swift/conceptual/…
– C0D3
Dec 1 ...
How do I start Mongo DB from Windows?
...on localhost:27017
Your MongoDB is started and connected with RoboMongo (now Robo 3T) - a third party GUI tool
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How to apply specific CSS rules to Chrome only?
...https://jeffclayton.wordpress.com/2015/08/10/1279/
/* Chrome, Safari, AND NOW ALSO the Edge Browser and Firefox */
@media and (-webkit-min-device-pixel-ratio:0) {
div{top:10;}
}
/* Chrome 29+ */
@media screen and (-webkit-min-device-pixel-ratio:0)
and (min-resolution:.001dpcm) {
div{top:0...
Bomb dropping algorithm
...e to prove we can be greedy in reducing the outer
perimeter.
But, we do know we can be greedy. Because no bomb in layer 2 can ever be more
efficient in reducing layer 2 to 0 than a strategically placed bomb in layer 3. And
for the same reason as before - there is always a bomb we can place in ...
How do I compare two DateTime objects in PHP 5.2.8?
...jects can be compared using comparison operators.
$date1 = new DateTime("now");
$date2 = new DateTime("tomorrow");
var_dump($date1 == $date2); // false
var_dump($date1 < $date2); // true
var_dump($date1 > $date2); // false
For PHP versions before 5.2.2 (actually for any version), you can ...
How to convert an address into a Google Maps Link (NOT MAP)
...: maps.google.com/?ll=38.882147,-76.99017
UPDATE
As of year 2017, Google now has an official way to create cross-platform Google Maps URLs:
https://developers.google.com/maps/documentation/urls/guide
You can use links like
https://www.google.com/maps/search/?api=1&query=1200%20Pennsylvania...