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Override Java System.currentTimeMillis for testing time sensitive code
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UPDATE The new java.time package built into Java 8 includes a java.time.Clock class "to allow alternate clocks to be plugged in as and when required".
– Basil Bourque
Oct 26 '14 at 8:02
...
Simplest two-way encryption using PHP
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guys, just FYI => MCRYPT IS DEPRECATED. capsing so everyone should know not to use it as it gave us a myriad of issues. It deprecated since PHP 7.1 if i'm not mistaken.
– clusterBuddy
Jun 3 '19 at 10:...
Is the size of C “int” 2 bytes or 4 bytes?
...mmon two (or four) byte integers.
Let's wrap things up so far:
sizeof => size in bytes, and
CHAR_BIT => number of bits in byte
Thus, Depending on your system, sizeof (unsigned int) could be any value greater than zero (not just 2 or 4), as if CHAR_BIT is 16, then a single (sixteen-bit) by...
UDP vs TCP, how much faster is it? [closed]
...nted, which greatly simplifies application client handling logic (listen -> accept -> client state is naturally independent of other clients). Handling multiple connections from a single client in particular becomes gnarly with UDP. And a point in UDP's favor is UDP stacks are really easy to i...
How to implement the activity stream in a social network
...me) and query for activities that are user_id IN (...friends...) AND time > some-cutoff-point. Ditching the id and choosing a different clustered index might be a good idea - I haven't experimented with that.
Pretty basic stuff, but it works, it's simple, and it is easy to work with as your nee...
Evenly space multiple views within a container view
...the views you want to contain in the Interface Builder and choose Editor -> Embed In -> Stack view. Set the appropriate width/height/margin constraints for the stack view, and make sure to set the Distribution property to 'Equal spacing':
Of course, if you need to support iOS 8 or lower, yo...
What is Type-safe?
...ou would overwrite existing data in 3 more adjacent bytes of memory.
int >> char:
|-|-|-|-|-|-|-|-| |?|?|?|?|?|?|?|?| |?|?|?|?|?|?|?|?| |?|?|?|?|?|?|?|?|
In the above case, the 3 bytes to the right are overwritten, so any pointers to that memory (say 3 consecutive chars) which expect to get...
AngularJS- Login and Authentication in each route and controller
...sRole: function (role) {
return userProfile.roles.indexOf(role) >= 0;
},
$hasAnyRole: function (roles) {
return !!userProfile.roles.filter(function (role) {
return roles.indexOf(role) >= 0;
}).length;
},
$isAnonymous: ...
Why do we need message brokers like RabbitMQ over a database like PostgreSQL?
...ds to be, eliminating the need for wasteful checks.
locking of the table -> again low performing: There is no table to lock :P
millions of rows of task -> again polling is low performing: As mentioned above, Rabbitmq will operate faster as it resides RAM, and provides flow control. If needed, ...
Is there a typical state machine implementation pattern?
...* );
void do_state_bar( state_t* );
void run_state( state_t* i ) {
i->function(i);
};
int main( void ) {
state_t state = { do_state_initial };
while ( 1 ) {
run_state( state );
// do other program logic, run other state machines, etc
}
}
Of course depending o...