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Are PostgreSQL column names case-sensitive?
...ame" = 'xyz';
Also fix the incorrect double-quotes around 'xyz'. Values (string literals) are enclosed in single quotes.
Read the manual here.
My standing advice is to use legal, lower-case names exclusively so double-quoting is not needed.
...
How can I add a class to a DOM element in JavaScript?
...ame = "aClassName1 aClassName2"; its just an attribute, you can assign any string you like, even if it makes for invalid html
– Darko Z
Apr 29 '14 at 9:47
18
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Java : How to determine the correct charset encoding of a stream
...d Jan 19 '11 at 13:44
Luciano FiandesioLuciano Fiandesio
9,43099 gold badges4444 silver badges5353 bronze badges
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What character encoding should I use for a HTTP header?
...er *TEXT or combinations
of token, separators, and quoted-string>
OCTET = <any 8-bit sequence of data>
TEXT = <any OCTET except CTLs,
but including LWS>
CTL = <any US-ASCII control character
(octets 0 ...
How to test if list element exists?
...tain NULL elements, it might not be enough to check is.null(foo$a). A more stringent test might be to check that the name is actually defined in the list:
foo <- list(a=42, b=NULL)
foo
is.null(foo[["a"]]) # FALSE
is.null(foo[["b"]]) # TRUE, but the element "exists"...
is.null(foo[["c"]]) # TRUE...
How can I sharpen an image in OpenCV?
... Wikipedia article on unsharp masking:
You use a Gaussian smoothing filter and subtract the smoothed version from the original image (in a weighted way so the values of a constant area remain constant).
To get a sharpened version of frame into image: (both cv::Mat)
cv::GaussianBlur(frame, image, cv:...
How to change the docker image installation directory?
...ker/daemon.json
(according to https://docs.docker.com/engine/reference/commandline/dockerd/#daemon-configuration-file).
With older versions, you can change Docker's storage base directory (where container and images go) using the -goption when starting the Docker daemon. (check docker --help).
You ...
What is the difference between #include and #include “filename”?
...in a single textual library file (similar to a unix archive), and used the string between the < and > as the key to index into the library.
– Adrian McCarthy
Feb 15 '17 at 23:14
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Get nodes where child node contains an attribute
...e
import com.ximpleware.*;
public class test1 {
public static void main(String[] s) throws Exception{
VTDGen vg = new VTDGen();
if (vg.parseFile("c:/books.xml", true)){
VTDNav vn = vg.getNav();
AutoPilot ap = new AutoPilot(vn);
ap.selectXPath("//book[titl...
How can I run MongoDB as a Windows service?
...
I think if you run it with the --install command line switch, it installs it as a Windows Service.
mongod --install
It might be worth reading this thread first though. There seems to be some problems with relative/absolute paths when the relevant registry key gets wr...