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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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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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Why does multiprocessing use only a single core after I import numpy?
...n OS issue, but I thought I would ask here in case anyone has some insight from the Python end of things.
3 Answers
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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.:
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PRIM...
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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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...
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 ...
How to make sure that string is valid JSON using JSON.NET
... if the string starts with { or [ and ends with } or ] respectively (added from this answer):
private static bool IsValidJson(string strInput)
{
if (string.IsNullOrWhiteSpace(strInput)) { return false;}
strInput = strInput.Trim();
if ((strInput.StartsWith("{") && strInput.EndsWit...
How to use null in switch
...d that:
The prohibition against using null as a switch label prevents one from writing code that can never be executed. If the switch expression is of a reference type, such as a boxed primitive type or an enum, a run-time error will occur if the expression evaluates to null at run-time.
You must ...