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Concatenating multiple text files into a single file in Bash
... Windows shell copy to concatenate files.
C:\> copy *.txt outputfile
From the help:
To append files, specify a single file for destination, but multiple files for source (using wildcards or file1+file2+file3 format).
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Check if image exists on server using JavaScript?
...n does not check if image exists on server. It check if file is accessible from server. There is no check if that file actually is an image. It could be .pdf, .html, some random file renamed to *.jpg or *.png. If something ends with .jpg it doesn't mean it's 100% image :)
– CoR...
Mercurial - all files that changed in a changeset?
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Just remove p from your hg log -vpr will show the list of files. -p means show patch. You can also use a template to format the output to your taste.
share
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undefined reference to boost::system::system_category() when compiling
...u 11.10 that uses the Boost libraries. I have the 1.46-dev Boost libraries from the Ubuntu Repository installed, but I get an error when compiling the program.
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What is the difference between RDF and OWL? [closed]
...en to a logical extreme. They have the advantage that you can load triples from many sources into one database with no reconfiguration.
RDF and RDFS
The next layer is RDF - The Resource Description Framework. RDF defines some extra structure to triples. The most important thing RDF defines is a pr...
Does the JVM prevent tail call optimizations?
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There is also more discussion in Sun bug #4726340, where the evaluation (from 2002) ends:
I believe this could be done nonetheless, but it is not a small task.
Currently, there is some work going on in the Da Vinci Machine project. The tail call subproject's status is listed as "proto 80%"; ...
Using Python String Formatting with Lists
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How about if you want to source your variables from multiple lists? tuple only takes a single list, and the formatter seems to only take a single tuple
– errant.info
Jun 17 '14 at 6:47
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MySQL Error 1215: Cannot add foreign key constraint
... Explosion Pill's answer covers the basics. You want to make sure to start from there. However, there are more, much more subtle cases to look out for:
For example, when you try to link up PRIMARY KEYs of different tables, make sure to provide proper ON UPDATE and ON DELETE options. E.g.:
...
PRIM...
How to scroll to top of page with JavaScript/jQuery?
...n. Here you go:
Add this code to your onload.
// This prevents the page from scrolling down to where it was previously.
if ('scrollRestoration' in history) {
history.scrollRestoration = 'manual';
}
// This is needed if the user scrolls down during page load and you want to make sure the page ...
Node.js get file extension
...e. "tar.gz$" or by building up a function that do that. like checking that from the end and going back and see if it match totally. and you will have that function that check the extension. WHY? because what about files like jone.lastTest.654654556.tar.gz here the extension that's expected is ta...