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How should I read a file line-by-line in Python?
...files faster than the garbage collector calls finalizers on orphaned file handles. The usual workaround is to trigger the GC immediately, but this is a nasty hack and it has to be done by every function that could encounter the error, including those in libraries. What a nightmare.
Or you could j...
SQLite - How do you join tables from different databases?
...s with keyword
.databases
Then you should be able to do the following.
select
*
from
db1.SomeTable a
inner join
db2.SomeTable b on b.SomeColumn = a.SomeColumn;
Note that "[t]he database names main and temp are reserved for the primary database and database to hold temporary tables a...
Casting vs using the 'as' keyword in the CLR
...g, which has largely replaced the as operator, as you can now write:
if (randomObject is TargetType tt)
{
// Use tt here
}
Note that tt is still in scope after this, but not definitely assigned. (It is definitely assigned within the if body.) That's slightly annoying in some cases, so if you ...
UDP vs TCP, how much faster is it? [closed]
...
UDP is faster than TCP, and the simple reason is because its non-existent acknowledge packet (ACK) that permits a continuous packet stream, instead of TCP that acknowledges a set of packets, calculated by using the TCP window size and round-trip tim...
Connect to a heroku database with pgadmin
...ase (postgres instance in Heroku), do the following:
Login to Heroku, and select the application in which you have the database
Select the Resources tab and then click on "Heroku Postgres Ad-on" (see below). This will open up a new tab.
Select the Settings tab and then click on "View Credential...
SQL Case Sensitive String Compare
...
Select * from a_table where attribute = 'k' COLLATE Latin1_General_CS_AS
Did the trick.
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Can I have an onclick effect in CSS?
...active too but is not listed because it does not support some of the other selectors)
– jrajav
Nov 29 '12 at 16:43
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What is the IntelliJ shortcut key to create a javadoc comment?
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Do I have to select something? Even if I select the whole file content or select nothing, nothing happens if I run this action. May I am missing something
– Honsa Stunna
Jun 18 '19 at 11:46
...
Remove duplicated rows using dplyr
...ce(from = 1, to = 1)
Or maybe a variation of unique() that would let you select which
variables to use:
df %>% unique(x, y)
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Filter git diff by type of change
... the two branches.
From man git-diff
--diff-filter=[ACDMRTUXB*]
Select only files that are
A Added
C Copied
D Deleted
M Modified
R Renamed
T have their type (mode) changed
U Unmerged
X Unknown
B have had their pairing Broken
* All-or-none
Any combination ...