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PostgreSQL: Difference between text and varchar (character varying)
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792
There is no difference, under the hood it's all varlena (variable length array).
Check this art...
Explicitly set Id with Doctrine when using “AUTO” strategy
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answered Aug 22 '12 at 21:25
nicolasbuinicolasbui
57066 silver badges55 bronze badges
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What is the rationale for all comparisons returning false for IEEE754 NaN values?
...wever, there is a similar property that does hold. Clause 5.11, paragraph 2 of the 754-2008 standard:
Four mutually exclusive relations are possible: less than, equal, greater than, and unordered. The last case arises when at least one operand is NaN. Every NaN shall compare unordered with ever...
Measure time in Linux - time vs clock vs getrusage vs clock_gettime vs gettimeofday vs timespec_get?
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2 Answers
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Active
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Use Expect in a Bash script to provide a password to an SSH command
...d "my_command1\r"
interact -o -nobuffer -re $prompt return
send "my_command2\r"
interact
Sample solution for bash could be:
#!/bin/bash
/usr/bin/expect -c 'expect "\n" { eval spawn ssh -oStrictHostKeyChecking=no -oCheckHostIP=no usr@$myhost.example.com; interact }'
This will wait for Enter and the...
Rename multiple files by replacing a particular pattern in the filenames using a shell script [dupli
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241
An example to help you get off the ground.
for f in *.jpg; do mv "$f" "$(echo "$f" | sed s/IMG...
Select statement to find duplicates on certain fields
...lds for which there are multiple records, you can use..
select field1,field2,field3, count(*)
from table_name
group by field1,field2,field3
having count(*) > 1
Check this link for more information on how to delete the rows.
http://support.microsoft.com/kb/139444
There should be a criterion...
How to create a function in a cshtml template?
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283
You can use the @helper Razor directive:
@helper WelcomeMessage(string username)
{
<p&...
How can you determine a point is between two other points on a line segment?
Let's say you have a two dimensional plane with 2 points (called a and b) on it represented by an x integer and a y integer for each point.
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