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What integer hash function are good that accepts an integer hash key?
...n should
be bijective to not loose information, if possible and have the least collisions
cascade as much and as evenly as possible, i.e. each input bit should flip every output bit with probability 0.5.
Let's first look at the identity function. It satisfies 1. but not 2. :
Input bit n deter...
git-diff to ignore ^M
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You're not working with CRLF files here, at least not in the example you posted. That's an old-style mac file (just uses \r for EOL). That's why the diff is being shown on one line. A file using dos EOL would show each line distinctly with a trailing ^M, which you c...
Count(*) vs Count(1) - SQL Server
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it should evaluate SYS_GUID() at least (I mean, exactly) once for the sub-query to return result, right?
– asgs
Oct 28 '18 at 20:09
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Is there a way to make a PowerShell script work by double clicking a .ps1 file?
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It's a security feature because it delays hackers by at least a few minutes until they find an alternative!
– MarcH
Jan 24 '16 at 6:19
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Tables instead of DIVs [duplicate]
...data, then it is not tabular data - it is just linear content. You need at least two rows and two columns before it can be considered tabular data.
Some examples:
Using tables for placing sidebars and page headers/footers. This is not tabular data but page layout. Something like css grid or flexbo...
What's the difference between echo, print, and print_r in PHP?
...and var_dump() will echo by default, add a second argument to print_r() at least that evaluates to true to get it to return instead, e.g. print_r($array, TRUE).
The difference between echoing and returning are:
echo: Will immediately print the value to the output.
returning: Will return the funct...
Which Architecture patterns are used on Android? [closed]
... you have added to it with setContentView, and also handling events for at least the various activity life cycle events.
In MVC, the controller is supposed to be the main entry point. Which is a bit debatable if this is the case when applying it to Android development, since the activity is the nat...
Has reCaptcha been cracked / hacked / OCR'd / defeated / broken? [closed]
...rous reCAPTCHA images, and it was actually some of the easiest ones (or at least quickest) broken.
UPDATE: CAPTCHA Killer's website is now taken down, apparently under legal pressure. See http://captcha.org/ for a complete overview of the topic.
And yeah, OCR is not the best way to break a CAPTC...
What are bitwise operators?
... << 8) | D;
Assuming that A is the most-significant byte and D the least. It would end up as:
A = 01000000
B = 00000101
C = 00101011
D = 11100011
val = 01000000 00000101 00101011 11100011
Colors are often stored this way (with the most significant byte either ignored or used as Alpha):
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How to merge dictionaries of dictionaries?
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This one seems to do the work, at least on my set of data, but as I never understood yield and generators well I'm pretty much lost as to why, but I'm gonna try a bit harder, might be useful!
– fdhex
Aug 26 '11 at 14:38
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