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dd: How to calculate optimal blocksize? [closed]
...tten the following script that tests writing a 128M test file with dd at a range of different block sizes, from the default of 512 bytes to a maximum of 64M. Be warned, this script uses dd internally, so use with caution.
dd_obs_test.sh:
#!/bin/bash
# Since we're dealing with dd, abort if any err...
Why is Go so slow (compared to Java)?
...eger addition, basically), gccgo produced code towards the fast end of the range between gcc -O0 and gcc -O2 for equivalent C. Go isn't inherently slow, but the compilers don't do everything, yet. Hardly surprising for a language that's 10 minutes old.
...
Is floating-point math consistent in C#? Can it be?
...this is not too hard(I have a half finished implementation) the very small range of values makes it annoying to use. You have to be careful at all times so you neither overflow, nor lose too much precision. In the end I found this not easier than using integers directly.
Implement FixedPoint64 in C#...
How to sort in-place using the merge sort algorithm?
...
}
It takes the array xs, the two sorted sub-arrays are represented as ranges [i, m) and [j, n) respectively. The working area starts from w. Compare with the standard merge algorithm given in most textbooks, this one exchanges the contents between the sorted sub-array and the working area. As t...
C char array initialization
...struct icont){ .array={ 42,67 } }; // 42, 67, 0, 0, 0, ...
// index ranges can overlap, the latter override the former
// (no compiler warning with -Wall -Wextra)
ic = (struct icont){ .array={ [0 ... 1]=42, [1 ... 2]=67 } }; // 42, 67, 67, 0, 0, ...
for (cnt=0; cnt<5; cnt++)
pri...
GridCtrl 控件FAQ - C/C++ - 清泛网 - 专注C/C++及内核技术
...选中行，请始终连续使用以下两个语句：
m_Grid.SetSelectedRange(nRow,0, nRow,m_Grid.GetColumnCount()-1)
m_Grid.EnsureVisible(nRow, 0);
其中nRow为要选中的那一行，强烈建议不要将这两句语句放在FillItem()中，这样会导致不灵活。
2. 可以控制...
Java code To convert byte to Hexadecimal
...t where their limits help to clarify your code; the fact that a variable's range is limited can serve as a form of documentation.
What does this mean? A few things: First and most importantly, it means we are working with 8-bits. So for example we can write the number 2 as 0000 0010. However, sinc...
How to open multiple pull requests on GitHub
...takes a bit of playing around.
Here's the steps:
Identify the two commit ranges you want to pull. Here's what i'll use for an example:
(other/master) A -> B -> C -> D -> E (yours/master)
Let's say that you want to pull B and C in one request, and D & E in another.
Make a pull reque...
Python function overloading
...can be used to achieve the equivalent effect.
– rawr rang
Jun 25 '19 at 14:59
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Immutable vs Mutable types
...n that are of immutable type:
int
float
decimal
complex
bool
string
tuple
range
frozenset
bytes
Some Unanswered Questions
Questions: Is string an immutable type?
Answer: yes it is, but can you explain this:
Proof 1:
a = "Hello"
a +=" World"
print a
Output
"Hello World"
In the above example the ...