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MD5 algorithm in Objective-C
... };
char *resultData = malloc(CC_MD5_DIGEST_LENGTH * 2 + 1);
for (uint index = 0; index < CC_MD5_DIGEST_LENGTH; index++) {
resultData[index * 2] = HexEncodeChars[(result[index] >> 4)];
resultData[index * 2 + 1] = HexEncodeChars[(result[index] % 0x10)];
}
res...
Fastest way to check if string contains only digits
... null || s == "") return false; for (int i = 0; i < s.Length; i++) if ((uint)(s[i] - '0') > 9) return false; return true; }
static bool isDigitsFx(string s) { if (s == null || s == "") return false; for (int i = 0; i < s.Length; i++) if ((s[i] ^ '0') > 9) return false; return true; }
sta...
Node.js throws “btoa is not defined” error
...op Chrome would return "fvXmvA=="
btoa(String.fromCharCode.apply(null, new Uint8Array([0x7e, 0xf5, 0xe6, 0xbc])));
As it turns out, Buffer instances represent/interpret strings encoded in UTF-8 by default. By contrast, in desktop Chrome, you can't even input a string that contains characters outsi...
Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
... $4, %rsi
cmpq $400000000, %rsi
jne .L3
EDIT: I also tried using uint64_t types on my machine to see if there was any performance boost. Performance was about 10% faster than 32-bit, and was nearly identical whether you were just using 64-bit types to reverse bits on two 32-bit int types ...
how to check the dtype of a column in python pandas
... treat_numeric(agg[y])
else:
treat_str(agg[y])
Note:
uint and UInt are of kind u, not kind i.
Consider the dtype introspection utility functions, e.g. pd.api.types.is_integer_dtype.
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...
A generic error occurred in GDI+, JPEG Image to MemoryStream
...You can verify this yourself with test:
int width = 480;
var height = UInt16.MaxValue - 36; //succeeds at 65499, 65500
try
{
while(true)
{
var image = new Bitmap(width, height);
using(MemoryStream ms = new MemoryStream())
{
//error will throw from here
...
What is a bus error?
...er math and then typecast for access to a problem mode (i.e. You set up an uint8_t array, add one, two, or three to the array's pointer and then typecast to a short, int, or long and try to access the offending result.) X86 systems will pretty much let you do this, albeit at a real performance pena...
Assign pandas dataframe column dtypes
...t pandas as pd
import numpy as np
x = np.empty((10,), dtype=[('x', np.uint8), ('y', np.float64)])
df = pd.DataFrame(x)
df.dtypes ->
x uint8
y float64
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...
Convert blob to base64
...n bufferToBinaryString(arrayBuffer){
return String.fromCharCode(...new Uint8Array(arrayBuffer));
}
(async () => console.log(btoa(bufferToBinaryString(await new Response(blob).arrayBuffer()))))();
or
function bufferToBinaryString(arrayBuffer){
return String.fromCharCode(...new Uint8Arra...
Is floating-point math consistent in C#? Can it be?
...ta type such as int, long, and BigInteger, and the non-CLS-compliant types uint and ulong.
As suggested in another answer, you can use lookup tables, where each element in the table is a binary fixed point number, to help implement complex functions such as sine, cosine, square root, and so on. If...