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What is the theoretical maximum number of open TCP connections that a modern Linux box can have
...hich limits the maximum number of file descriptors for a process. That is by default a lot less than 300K, usually 1024.
– pacoverflow
Oct 31 '13 at 23:28
1
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how to write setTimeout with params by Coffeescript
... imageUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454...
Where is body in a nodejs http.get response?
...a" event might be called multiple times and you will get the content piece by piece. Example does not show how to glue them together.
– Andrej
Jul 5 '15 at 0:45
4
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Comparing boxed Long values 127 and 128
...variables the value 127 (cached), the same object instance will be pointed by all references. (N variables, 1 instance)
If you set to N Long variables the value 128 (not cached), you will have an object instance pointed by every reference. (N variables, N instances)
That's why this:
Long val1 = 1...
Generic type parameter naming convention for Java (with multiple chars)?
...rials > Generics > Generic Types:
Type Parameter Naming Conventions
By convention, type parameter names are single, uppercase letters. This stands in sharp contrast to the variable naming conventions that you already know about, and with good reason: Without this convention, it would be diffi...
Implementing IDisposable correctly
... to "clean up" strings and ints - they will be taken care of automatically by the garbage collector. The only thing that needs to be cleaned up in Dispose are unmanaged resources or managed recources that implement IDisposable.
However, assuming this is just a learning exercise, the recommended wa...
Reading/parsing Excel (xls) files with Python
...rkbook
workbook = xlrd.open_workbook('your_file_name.xlsx')
open sheet by name
worksheet = workbook.sheet_by_name('Name of the Sheet')
open sheet by index
worksheet = workbook.sheet_by_index(0)
read cell value
worksheet.cell(0, 0).value
...
PostgreSQL create table if not exists
...g_tables only contains actual tables. The identifier may still be occupied by related objects. See:
How to check if a table exists in a given schema
If the role executing this function does not have the necessary privileges to create the table you might want to use SECURITY DEFINER for the functio...
Update Row if it Exists Else Insert Logic with Entity Framework
...);
}
context.SaveChanges();
If you can't decide existance of the object by its Id you must exectue lookup query:
var id = myEntity.Id;
if (context.MyEntities.Any(e => e.Id == id))
{
context.MyEntities.Attach(myEntity);
context.ObjectStateManager.ChangeObjectState(myEntity, EntityState...
Vim Regex Capture Groups [bau -> byau : ceu -> cyeu]
...
One way to fix this is by ensuring the pattern is enclosed by escaped parentheses:
:%s/\(\w\)\(\w\w\)/\1y\2/g
Slightly shorter (and more magic-al) is to use \v, meaning that in the pattern after it all ASCII characters except '0'-'9', 'a'-'z', '...