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Reading binary file and looping over each byte
... example uses a chunksize of 8192 Bytes. The parameter for the file.read()-function simply specifies the size, i.e. the number of Bytes to be read. codeape chose 8192 Byte = 8 kB (actually it's KiB but that's not as commonly known). The value is "totally" random but 8 kB seems to be an appropriate v...
C++ performance challenge: integer to std::string conversion
...
Ah, awesome challenge by the way... I've had a lot of fun with this.
I have two algorithms to submit (code is at the bottom if you feel like skipping to it). In my comparisons I require that the function return a string and that it can handle int and unsigned int. Comparing thi...
Is there a way to pass optional parameters to a function?
Is there a way in Python to pass optional parameters to a function while calling it and in the function definition have some code based on "only if the optional parameter is passed"
...
How to compile a static library in Linux?
...e lib
#include <stdio.h>
#include "lib.h"
int main ( void )
{
fun1(10);
fun2(10);
return 0;
}
lib.h the libs main header
#ifndef LIB_H_INCLUDED
#define LIB_H_INCLUDED
#include "lib1.h"
#include "lib2.h"
#endif
lib1.c first lib source
#include "lib1.h"
#include <stdio...
Detect if value is number in MySQL
...l1 * 1) = col1
It doesn't work for non-standard numbers like
1e4
1.2e5
123. (trailing decimal)
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How can I use speech recognition without the annoying dialog in android phones
... object : ConversionCallback {
override fun onSuccess(result: String) {
sttOutput.text = result
}
override fun onCompletion() {
}
...
MySQL Conditional Insert
...nsert, try:
INSERT INTO x_table(instance, user, item)
SELECT 919191, 123, 456
FROM dual
WHERE NOT EXISTS (SELECT * FROM x_table
WHERE user = 123
AND item = 456)
In this, dual is a table with one row only (found orig...
CSS: bolding some text without changing its container's size
...important; text-shadow: none!important; }
<li class="shadow0">MmmIii123 This line tests shadow0 (plain)</li>
<li class="shadow2">MmmIii123 This line tests shadow2 (0.02ex)</li>
<li class="shadow4">MmmIii123 This line tests shadow4 (0.04ex)</li>
<li class="s...
How to find elements with 'value=x'?
I need to remove element that have value="123" . I know that all elements with different values are located into #attached_docs , but I don't know how to select element with value="123" .
...
How to print pandas DataFrame without index
... len(df)
df.index=blankIndex
If we use the data from your post:
row1 = (123, '2014-07-08 00:09:00', 1411)
row2 = (123, '2014-07-08 00:49:00', 1041)
row3 = (123, '2014-07-08 00:09:00', 1411)
data = [row1, row2, row3]
#set up dataframe
df = pd.DataFrame(data, columns=('User ID', 'Enter Time', 'Acti...