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Bash history without line numbers
...k! Can you explain what it's doing? Will it work if the numbers are 1 - 10,000?
– cwd
Aug 18 '11 at 15:47
29
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SHA1 vs md5 vs SHA256: which to use for a PHP login?
...oint some of you are missing is that it doesn't matter if the password is 1000% secure when all the other data is clear-text. E.g., if the entire database is compromised, then the hacker now has all the clear-text credit card numbers. Yes, many people use the same password on different web-sites, bu...
IEnumerable to string [duplicate]
...Here's some benchmarks I took on a dev machine and it looks about right.
1000000 iterations on a 300 character sequence on a 32-bit release build:
ToArrayString: 00:00:03.1695463
Concat: 00:00:07.2518054
StringBuilderChars: 00:00:03.1335455
StringBuilderStrings: 00:00:06.46...
What is an example of the simplest possible Socket.io example?
....toJSON() });
}
// Send current time every 10 secs
setInterval(sendTime, 10000);
// Emit welcome message on connection
io.on('connection', function(socket) {
// Use socket to communicate with this particular client only, sending it it's own id
socket.emit('welcome', { message: 'Welcome!', ...
How costly is .NET reflection?
...y Things, Jeff Richter shows that calling a method by reflection is about 1000 times slower than calling it normally.
Jeff's tip: if you need to call the method multiple times, use reflection once to find it, then assign it to a delegate, and then call the delegate.
...
Is std::vector so much slower than plain arrays?
...
You are doing 1 000 000 000 array accesses. The time difference is 0.333 seconds. Or a difference of 0.000000000333 per array access. Assuming a 2.33 GHz Processor like mine that's 0.7 instruction pipeline stages per array accesses. So the v...
Test or check if sheet exists
...ory I ran some benchmark tests on this vs. Tim Williams' answer. Over 500,000 loops, yours took 22 seconds and Tim's took <1.
– rory.ap
Mar 15 '16 at 12:10
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How do I get whole and fractional parts from double in JSP/Java?
...bits = Double.doubleToLongBits(3.25);
boolean isNegative = (bits & 0x8000000000000000L) != 0;
long exponent = (bits & 0x7ff0000000000000L) >> 52;
long mantissa = bits & 0x000fffffffffffffL;
sh...
jQuery pitfalls to avoid [closed]
...
Aaaaaaah! Well, that's about 1,000,000 of my bugs fixed. +1
– jammus
Aug 6 '09 at 14:53
4
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Read specific columns from a csv file with csv module?
...s['street'])
With a file like
name,phone,street
Bob,0893,32 Silly
James,000,400 McHilly
Smithers,4442,23 Looped St.
Will output
>>>
['Bob', 'James', 'Smithers']
['0893', '000', '4442']
['32 Silly', '400 McHilly', '23 Looped St.']
Or alternatively if you want numerical indexing for ...