大约有 40,000 项符合查询结果（耗时：0.0458秒） [XML]
Floating point vs integer calculations on modern hardware
...
From my experience, there are many, many variables to performance...especially between integer & floating point math. It varies strongly from processor to processor (even within the same family such as x86) because different processors have different "pipeline" lengths. Also, some operations ...
Finding sum of elements in Swift array
...st) way to find the sum of an array of integers in swift?
I have an array called multiples and I would like to know the sum of the multiples.
...
Multiple aggregations of the same column using pandas GroupBy.agg()
... functions f1, f2 to the same column df["returns"] , without having to call agg() multiple times?
3 Answers
...
Data binding to SelectedItem in a WPF Treeview
...SelectedItemChanged += new RoutedPropertyChangedEventHandler<object>(___ICH);
}
void ___ICH(object sender, RoutedPropertyChangedEventArgs<object> e)
{
if (SelectedItem != null)
{
SetValue(SelectedItem_Property, SelectedItem);
}
}
...
How do I use Java to read from a file that is actively being written to?
...verflow.com/a/559146/1255493
public void run() {
try {
while (_running) {
Thread.sleep(_updateInterval);
long len = _file.length();
if (len < _filePointer) {
// Log must have been jibbled or deleted.
this.appendMessa...
How to rename a file using Python
...3.7 ubuntu, works for me using relative paths
– toing_toing
Feb 28 '19 at 15:51
2
@toing_toing of...
Android: how to make keyboard enter button say “Search” and handle its click?
...w v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
performSearch();
return true;
}
return false;
}
});
share
|
...
How to TryParse for Enum value?
....Val1|MyEnum.Val2" which is a combination of two enum values. If you just call Enum.IsDefined with this string, it will return false, even though Enum.Parse handles it correctly.
Update
As mentioned by Lisa and Christian in the comments, Enum.TryParse is now available for C# in .NET4 and up.
MSDN...
Get last n lines of a file, similar to tail
... blocks.append(f.read(BLOCK_SIZE))
else:
# file too small, start from begining
f.seek(0,0)
# only read what was not read
blocks.append(f.read(block_end_byte))
lines_found = blocks[-1].count('\n')
lines_to_go -= lines_found
...
MAMP Pro 3.05 on Mavericks updated to Yosemite - Apache does not start
...e the file “envvars” located in /Applications/MAMP/Library/bin into “_envvars”
Test Update: It works!
Works for Yosemite release too!
share
|
improve this answer
|
...