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namedtuple and default values for optional keyword arguments
...you (optionally) set the default values to something other than None. This does not support required arguments.
import collections
def namedtuple_with_defaults(typename, field_names, default_values=()):
T = collections.namedtuple(typename, field_names)
T.__new__.__defaults__ = (None,) * len...
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock'
... or something else.
That error means the file /var/run/mysqld/mysqld.sock doesn't exists, if you didn't install mysql-server, then the file would not exist. So in that case, install it with
sudo apt-get install mysql-server
But if the mysql-server is already installed and is running, then you n...
iOS 7: UITableView shows under status bar
...ve attempted to set the UITableView frame to offset by 20 pixels, but it doesn't appear to take effect and as I currently need the app to be compatible with iOS 6 I can't jump to iOS 7 Storyboards to force autolayout to use the top height guide. Has anyone found a solution that works for both vers...
Sending websocket ping/pong frame from browser
...ionality. But personally I am using Ping / Pong, and never saw client that does not implement this type of OpCode and automatic response on low level client side implementation.
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Priority queue in .Net [closed]
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I tried to use it but it has serious flaws. IntervalHeap does not have a built-in concept of priority and forces you to implement IComparable or IComparer making it a sorted collection not a "Priority". Even worse there is no direct way to update priority of some previous entry!!!
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How to find gaps in sequential numbering in mysql?
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the only problem with this, is that it doesn't "report" a possible initial gap. e.g. if the first 5 ids are missing (1 through 5) it doesn't show that... How could we show pissible gaps at the very begining?
– DiegoDD
Apr 12 ...
Select objects based on value of variable in object using jq
... Making the name key variable (use a shell function with $1 as parameter) does not work: termux-contact-list |jq -r '.[] | select(.name=="$1")|.number'. I call it like cool_fn Name1. However, this works: termux-contact-list |jq -r '.[] | select(.name=="Name1")|.number'
– Timo
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How to import CSV file data into a PostgreSQL table?
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@asksw0rder does \copy have the same syntax? bcoz I'm getting a syntax error with \copy
– JhovaniC
May 29 '13 at 19:59
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Programmatically set height on LayoutParams as density-independent pixels
...IT_DIP, <HEIGHT>, getResources().getDisplayMetrics());
For me this does the trick.
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“Insert if not exists” statement in SQLite
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This does not work for me. it always inserts as in insert or replace into my_table (col1, col2) values('1','2'); will add multiple rows of 1 2
– Peter Moore
Oct 17 '19 at 17:15
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