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Convert RGB to RGBA over white
I have a hex color, e.g. #F4F8FB (or rgb(244, 248, 251) ) that I want converted into an as-transparent-as-possible rgba color (when displayed over white). Make sense? I'm looking for an algorithm, or at least idea of an algorithm for how to do so.
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Character reading from file in Python
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@hop: oops, forgot ord() returns decimal instead of hex. Thank you for the catch.
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What should I do if two libraries provide a function with the same name generating a conflict?
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Here's a thought. Open one of the offending libraries in a hex editor and change all occurrences of the offending strings to something else. You should then be able to use the new names in all future calls.
UPDATE: I just did it on this end and it seems to work. Of course, I've n...
Why is Java's boolean primitive size not defined?
...y{
boolean b;
}
Compile them both and compare the .class files with a hex editor.
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Declaring an unsigned int in Java
...ourBytesIJustRead & 0xffffffffl;
Note, that it is important that the hex literal is a long literal, not an int literal - hence the 'l' at the end.
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Drawing a dot on HTML5 canvas [duplicate]
... would be more efficient and intuitive to pass the whole color as a single hex digit/color constant than three color values.
– Dmitry
Jul 13 '16 at 0:47
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Debugging sqlite database on the device
...tabase was downloaded correctly open the DB file in a viewer (preferably a hex-viewer) and check whether it starts with SQLite format 3 string. Also make sure you have a correct sqlite version (i.e. you're not trying to open sqlite3 database with sqlite2 executable). And you may also try other SQLi...
Aren't Python strings immutable? Then why does a + “ ” + b work?
...thod-wrapper '__repr__' of str object at 0x109198490>
Notice that the hex memory location did not change when I stored the same value in the variable twice. It did change when I stored a different value. The string is immutable. Not because of zealotry, but because you pay the performance penal...
Are +0 and -0 the same?
... bit integer value and a sign-bit. In this representation, the value 1000 (hex) and 0000 both are 0, but one of them is +0 and the other is -0.
This could be avoided by subtracting 1 from the integer value so it ranged from -1 to -2^16, but this would be inconvenient.
A more common approach is to...
Base64 encoding in SQL Server 2005 T-SQL
...dERhdGE="
SELECT
CAST(N'' AS XML).value(
'xs:base64Binary(xs:hexBinary(sql:column("bin")))'
, 'VARCHAR(MAX)'
) Base64Encoding
FROM (
SELECT CAST('TestData' AS VARBINARY(MAX)) AS bin
) AS bin_sql_server_temp;
-- Decode the Base64-encoded string "VGVzdERhdGE=" to get b...