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Determine the number of NA values in a column
... sum(is.na(x))) %>%
gather(feature, num_nulls) %>%
print(n = 100)
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How do I convert CamelCase into human-readable names in Java?
...gex-based one: this is my benchmark for executing the aforementioned tests 100,000 times: ``` regex-based method took 4820 milliseconds ////////// commons-lang-based method took 232 milliseconds ``` that's about 20 times faster than the one that uses regex!!!!
– Clint Eastwoo...
Why does Math.Round(2.5) return 2 instead of 3?
...divide trickery to achieve the same effect:
c = System.Math.Truncate (n * 100) / 100; // 3.14
d = System.Math.Ceiling (n * 100) / 100; // 3.15
(a) Of course, that theory depends on the fact that your data has an fairly even spread of values across the even...
How random is JavaScript's Math.random?
...
Given numbers between 1 and 100.
9 have 1 digit (1-9)
90 have 2 digits (10-99)
1 has 3 digits (100)
Given numbers between 1 and 1000.
9 have 1 digit
90 have 2 digits
900 have 3 digits
1 has 4 digits
and so on.
So if you select some at random, ...
Sending files using POST with HttpURLConnection
...nn = (HttpURLConnection) url.openConnection();
conn.setReadTimeout(10000);
conn.setConnectTimeout(15000);
conn.setRequestMethod("POST");
conn.setUseCaches(false);
conn.setDoInput(true);
conn.setDoOutput(true);
conn.setRequestProperty("Connecti...
Why does LayoutInflater ignore the layout_width and layout_height layout parameters I've specified?
...ut.red, null);
parent.addView(view);
// result: layout_height=100 layout_width=100
view = LayoutInflater.from(this).inflate(R.layout.red, null);
parent.addView(view, 100, 100);
// result: layout_height=25dp layout_width=25dp
// view=textView due to attachRoot=fa...
Freeze the top row for an html table only (Fixed Table Header Scrolling) [duplicate]
...to fix, but the first row of data, the concept is still the same. I wasn't 100% which you were referring to.
Additional thought
I was tasked by my company to research a solution for this that could function in IE7+, Firefox, and Chrome.
After many moons of searching, trying, and frustration it rea...
Uint8Array to string in Javascript
...en I feed it 300+k chars, or RangeError for Chrome 39. Firefox 33 is ok. 100+k runs ok with all three.
– Sheepy
Nov 29 '14 at 4:30
...
How does C compute sin() and other math functions?
... double pow = x;
while (fabs(acc) > .00000001 && i < 100){
fact *= ((2*i)*(2*i+1));
pow *= -1 * x*x;
acc = pow / fact;
cur += acc;
i++;
}
return cur;
}
...
How to get an MD5 checksum in PowerShell
...Hashing File" `
-Status $file -percentComplete ($total/$fd.length * 100)
}
# Finalize the last read
$md5.TransformFinalBlock($buf, 0, $read_len)
$hash = $md5.Hash
# Convert hash bytes to a hexadecimal formatted string
$hash | foreach { $hash_txt += $_.ToString("x2") }
Write-Host $hash_txt
...