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Convert Unix timestamp into human readable date using MySQL
Is there a MySQL function which can be used to convert a Unix timestamp into a human readable date? I have one field where I save Unix times and now I want to add another field for human readable dates.
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What is Virtual DOM?
...tically huge. Finding and updating a node/nodes in case of an event is not time efficient.
VDOM solves this problem by creating a high label abstraction of actual dom. The VDOM is a high level lightweight in-memory tree representation of actual DOM.
For example, consider adding a node in DOM; re...
Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
...F, 0xBF, 0x7F, 0xFF
};
unsigned int v; // reverse 32-bit value, 8 bits at time
unsigned int c; // c will get v reversed
// Option 1:
c = (BitReverseTable256[v & 0xff] << 24) |
(BitReverseTable256[(v >> 8) & 0xff] << 16) |
(BitReverseTable256[(v >> 16) &...
How do I make the first letter of a string uppercase in JavaScript?
...uage feature. Just because Prototype.js extended Object itself for a brief time, doesn't mean extending Natives is bad. You shouldn't do it if you're writing code for an unknown consumer (like an analytics script that goes on random sites), but other than that it's fine.
– csuw...
Apache Spark: The number of cores vs. the number of executors
...s 100% limited by concurrency (the number of threads). We would expect runtime to be perfectly inversely correlated with the number of threads.
ratio_num_threads = nthread_job1 / nthread_job3 = 15/24 = 0.625
inv_ratio_runtime = 1/(duration_job1 / duration_job3) = 1/(50/31) = 31/50 = 0.62
So rati...
Can I “multiply” a string (in C#)?
...g();
return _s;
}
I think I pulled that one from Stack Overflow some time ago, so it is not my idea.
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TypeScript function overloading
...ypeScript would do it if there was a reliable way of checking types at run time.
– thorn̈
Mar 14 '16 at 23:04
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Compare given date with today
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strtotime($var);
Turns it into a time value
time() - strtotime($var);
Gives you the seconds since $var
if((time()-(60*60*24)) < strtotime($var))
Will check if $var has been within the last day.
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Sending a mail from a linux shell script
...t; is used to redirect standard input. It's been a part of bash for a long time.
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Getting all names in an enum as a String[]
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Why call values() 13 times, generating a new array each time, instead of caching the array in a local variable? Why use toString(), which is overridable, instead of name()?
– JB Nizet
Dec 9 '12 at 0:12
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