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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular implementation?
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TypeError: sequence item 0: expected string, int found
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edited Jun 4 '12 at 12:00
answered Jun 4 '12 at 11:54
cv...
Difference between map and collect in Ruby?
...well: In C++'s Standard Template Library, it is called transform, in C# (3.0)'s LINQ library, it is provided as an extension method called Select. Map is also a frequently used operation in high level languages such as Perl, Python and Ruby; the operation is called map in all three of these language...
Why does the C# compiler go mad on this nested LINQ query?
...machine) and very long time to compile (actually I get IO exception after 10 minutes).
1 Answer
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Maven: best way of linking custom external JAR to my project?
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209
You can create an In Project Repository, so you don't have to run mvn install:install-file eve...
How to build an android library with Android Studio and gradle?
... }
dependencies {
classpath 'com.android.tools.build:gradle:0.3'
}
}
Now we need to tell Gradle about some of the Android parts. It's pretty simple. A basic one (that works in most of my cases) looks like the following. I have a comment in this block, it will allow me to specify...
Adding iOS UITableView HeaderView (not section header)
...ht; }
– panthor314
Aug 26 '16 at 20:01
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show 2 more comments
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Confusion between factor levels and factor labels
...ends?
– donodarazao
May 3 '11 at 13:02
6
I would often transform the levels right before plotting...
Pandas conditional creation of a series/dataframe column
...here(df['Set']=='Z', 'green', 'red')
print(df)
yields
Set Type color
0 Z A green
1 Z B green
2 X B red
3 Y C red
If you have more than two conditions then use np.select. For example, if you want color to be
yellow when (df['Set'] == 'Z') & (df['Type'] == ...
Make Div overlay ENTIRE page (not just viewport)?
...nd why this is so hard to do... I've tried setting body, html heights to 100% etc but that isn't working. Here is what I have so far:
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