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How do I position one image on top of another in HTML?
...
@Me_developer You wouldn't do it this way. You'd use auto margins. w3schools.com/howto/howto_css_image_center.asp
– Craigo
Jan 23 at 8:47
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What does “coalgebra” mean in the context of programming?
... property and setPosition function:
class C
private
x, y : Int
_name : String
public
name : String
position : (Int, Int)
setPosition : (Int, Int) → C
We need two parts to represent this class. First, we need to represent the internal state of the object; in th...
How can I use a search engine to search for special characters? [closed]
...ace before it, in which case it is a negative sign.)
The underscore symbol _ is not ignored when it connects two words, e.g. [ quick_sort ].
As such, it is not well suited for these types of searchs. Google Code however does have syntax for searching through their code projects, that includes a ro...
Efficient SQL test query or validation query that will work across all (or most) databases
...himpsky)
PostgreSQL
SQLite
SELECT 1 FROM DUAL
Oracle
SELECT 1 FROM any_existing_table WHERE 1=0
or
SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS
or
CALL NOW()
HSQLDB (tested with version 1.8.0.10)
Note: I tried using a WHERE 1=0 clause on the second query, but it didn't work as a value for Ap...
Using Node.JS, how do I read a JSON file into (server) memory?
... large JSON files. since it would tie up node.
– Sean_A91
Aug 3 '15 at 4:29
25
For the sake of co...
How do I delete from multiple tables using INNER JOIN in SQL server
...ete from first detail table using join syntax
DELETE d
FROM DetailTable_1 D
INNER JOIN #DeleteIds X
ON D.MasterTableId = X.Id
-- delete from second detail table using IN clause
DELETE FROM DetailTable_2
WHERE MasterTableId IN (
SELECT X.Id
FROM #DeleteIds X
)
-- and...
PostgreSQL database default location on Linux
...untu 14.04 by default.
You can find postgresql.conf and look at param data_directory. If it is commented then database directory is the same as this config file directory.
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make an html svg object also a clickable link
...c14bd68a4b06a6
Found via comment 20 here https://bugzilla.mozilla.org/show_bug.cgi?id=294932
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How to format a number as percentage in R?
...s pointed out by @DzimitryM, percent() has been "retired" in favor of label_percent(), which is a synonym for the old percent_format() function.
label_percent() returns a function, so to use it, you need an extra pair of parentheses.
library(scales)
x <- c(-1, 0, 0.1, 0.555555, 1, 100)
label_pe...
Efficiently test if a port is open on Linux?
...t recent distros ship with: Fedora, Centos, etc. (nmap-ncat-6.01-9.fc18.x86_64)
– Zack
Dec 20 '15 at 14:13
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