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What does value & 0xff do in Java?
...values1, so what happens is:
value is promoted to an int (ff ff ff fe).
0xff is an int literal (00 00 00 ff).
The & is applied to yield the desired value for result.
(The point is that conversion to int happens before the & operator is applied.)
1Well, not quite. The & operator work...
Send a file via HTTP POST with C#
... from NuGet) there is an easier way to simulate form requests. Here is an example:
private async Task<System.IO.Stream> Upload(string actionUrl, string paramString, Stream paramFileStream, byte [] paramFileBytes)
{
HttpContent stringContent = new StringContent(paramString);
HttpConten...
Shell command to sum integers, one per line?
I am looking for a command that will accept (as input) multiple lines of text, each line containing a single integer, and output the sum of these integers.
...
Enum “Inheritance”
... In fact all enums must actually inherit from System.Enum. C# allows syntax to change the underlying representation of the enum values which looks like inheritance, but in actuality they still inherit from System.enum.
See section 8.5.2 of the CLI spec for the full details. Relevant information f...
_csv.Error: field larger than field limit (131072)
...e the field_size_limit:
import sys
import csv
csv.field_size_limit(sys.maxsize)
sys.maxsize works for Python 2.x and 3.x. sys.maxint would only work with Python 2.x (SO: what-is-sys-maxint-in-python-3)
Update
As Geoff pointed out, the code above might result in the following error: OverflowErr...
Why does C# forbid generic attribute types?
This causes a compile-time exception:
7 Answers
7
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How to run a shell script on a Unix console or Mac terminal?
...
To run a non-executable sh script, use:
sh myscript
To run a non-executable bash script, use:
bash myscript
To start an executable (which is any file with executable permission); you just specify it by its path:
/foo/bar
/bin/bar
./...
How can I restore the MySQL root user’s full privileges?
...r.
Enter your password
At the mysql command line enter: use mysql;
Then execute this query:
insert into `user` (`Host`, `User`, `Password`, `Select_priv`, `Insert_priv`, `Update_priv`, `Delete_priv`, `Create_priv`, `Drop_priv`, `Reload_priv`, `Shutdown_priv`, `Process_priv`, `File_priv`, `Grant_p...
Reading a huge .csv file
..."rb") as csvfile:
datareader = csv.reader(csvfile)
yield next(datareader) # yield the header row
count = 0
for row in datareader:
if row[3] == criterion:
yield row
count += 1
elif count:
# done w...