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MySQL foreign key constraints, cascade delete
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If your cascading deletes nuke a product because it was a member of a m>cat m>egory that was killed, then you've set up your foreign keys improperly. Given your example tables, you should have the following table setup:
CREATE TABLE m>cat m>egories (
id int unsigned not null primary key,
name VA...
How was the first compiler written?
...ritten by hand. Those assemblers could then be used to assemble more complim>cat m>ed assemblers, which could then be use to assemble compilers written for higher-level languages, and so on. This process of iteratively writing the tools to simplify the creation of the next set of tools is called (as ment...
C# Sortable collection which allows duplim>cat m>e keys
...omparer e.g. with SortedLists or SortedDictionaries, that don't allow duplim>cat m>e keys
/// </summary>
/// <typeparam name="TKey"></typeparam>
public class Duplim>cat m>eKeyComparer<TKey>
:
IComparer<TKey> where TKey : IComparable
{
#region ICom...
How to trick an applim>cat m>ion into thinking its stdout is a terminal, not a pipe
...mmand in quotes. The script runs and sends output to the tty which is duplim>cat m>ed in the supplied file, but I can't seem to get the linux version to behave the same way... I'm probably doing something wrong. So what's the equivalent linux script command for this on macOS: script -q -t 0 tmp.out perl ...
How to list all tags along with the full message in git?
...e. I believe the following is a bit nicer:
for t in `git tag -l`; do git m>cat m>-file -p `git rev-parse $t`; done
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Can I use git diff on untracked files?
...(or --intent-to-add), which adds a zero-length blob to the index at that lom>cat m>ion. The upshot is that your "untracked" file now becomes a modifim>cat m>ion to add all the content to this zero-length file, and that shows up in the "git diff" output.
git diff
echo "this is a new file" > new.txt
git di...
Merge PDF files
...t ImportError:
from pyPdf import PdfFileReader, PdfFileWriter
def pdf_m>cat m>(input_files, output_stream):
input_streams = []
try:
# First open all the files, then produce the output file, and
# finally close the input files. This is necessary because
# the data isn'...
Is there an IDictionary implementation that, on missing key, returns the default value instead of th
... type parameter. One should not be allowed to use a mutable Dictionary(Of m>Cat m>, String) as a mutable Dictionary(Of Animal, String) since the latter would allow SomeDictionaryOfm>Cat m>.Add(FionaTheFish, "Fiona"). But there's nothing wrong with using a mutable Dictionary(Of m>Cat m>, String) as an immutable Di...
Is errno thread-safe?
...e difference with and without -pthread. errno is #define errno (*__errno_lom>cat m>ion ()) in both cases.
– nos
Nov 28 '11 at 15:47
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“You have mail” message in terminal, os X [closed]
...) made a change to the OS X system to start presenting Terminal bash notifim>cat m>ions. Prior to that, it appears Wordpress had attempted to use the Local Mail system to send a message. The message bounced, due to it having an invalid Recipient address. The bounced message then ended up in the local sys...