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Good Hash Function for Strings
...d use hash codes instead. Throughout my entire corpus, there are about 600,000 unique words, and using the default java hashcode function, I was getting about 3.5% collisions. But if I SHA-256 the string value and then generate a hashcode from the digested string, the collision ratio is less than 0....
How does one make a Zip bomb?
...e under Linux using the following command:
dd if=/dev/zero bs=1024 count=10000 | zip zipbomb.zip -
Replace count with the number of KB you want to compress. The example above creates a 10MiB zip bomb (not much of a bomb at all, but it shows the process).
You DO NOT need hard disk space to store a...
CSS 100% height with padding/margin
...t:300px;}, and "panel" have varying contents/content-height, with {border:#000 solid 1px; float:left; margin-right:10px;}. Make all "panel" the height of "panels" without losing borders at any point. The "panel" divs cannot be pos:abs'd here. @Marco's solution works for this scenario, though.
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Convert UTC/GMT time to local time
...
For strings such as 2012-09-19 01:27:30.000, DateTime.Parse cannot tell what time zone the date and time are from.
DateTime has a Kind property, which can have one of three time zone options:
Unspecified
Local
Utc
NOTE If you are wishing to represent a date/ti...
What is a columnar database?
... Amazon offers its super fast RedShift data storage under $1,000 per terabyte per year if you are not particularly looking for Columnar one.
– mevdiven
Dec 5 '12 at 21:23
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Use LINQ to get items in one List, that are not in another List
...
This method (list of over 50,000 items) was significantly faster than the ANY method!
– DaveN
Jul 23 '17 at 8:59
5
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django test app error - Got an error creating the test database: permission denied to create databas
...---------------------------------------------------------
Ran 0 tests in 0.000s
OK
Process finished with exit code 0
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Why do browsers match CSS selectors from right to left?
...l or whatever and has the one <span> it's trying to style and the 10,000+ rules Gmail puts in its stylesheet (I'm not making that number up).
In particular, in the situation the browser is looking at most of the selectors it's considering don't match the element in question. So the problem b...
Best approach to remove time part of datetime in SQL Server
...erately within datetime2, year 0218
DECLARE @datetime2epoch datetime2 = '19000101'
select DATEADD(dd, DATEDIFF(dd, @datetime2epoch, @datetime2value), @datetime2epoch)
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CSS: How to position two elements on top of each other, without specifying a height?
...mn: 1;
grid-row: 1;
}
.layer1 span{
color: #fff;
background: #000cf6;
}
.layer2{
background: rgba(255, 0, 0, 0.4);
}
<div class="container_row">
<div class="layer1">
<span>Lorem ipsum...<br>Test test</span>
</div>
<...