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Why are dates calculated from January 1st, 1970?
...he date was chosen. It just was.
Astronomers use their own epochal date: http://en.wikipedia.org/wiki/Epoch_(astronomy)
Why? A date has to be chosen to make the math work out. Any random date will work.
A date far in the past avoids negative numbers for the general case.
Some of the smarter p...
Download JSON object as a file from browser
...tainer = document.getElementById('container');
container.appendChild(a);
http://jsfiddle.net/sz76c083/1
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Get the _id of inserted document in Mongo database in NodeJS
...ection.insert that will return the doc or docs inserted, which should have _ids.
Try:
collection.insert(objectToInsert, function(err,docsInserted){
console.log(docsInserted);
});
and check the console to see what I mean.
...
How do I profile memory usage in Python?
... 51336 2 3133500 96 type
9 667 1 24012 1 3157512 97 __builtin__.wrapper_descriptor
<76 more rows. Type e.g. '_.more' to view.>
>>> h.iso(1,[],{})
Partition of a set of 3 objects. Total size = 176 bytes.
Index Count % Size % Cumulative % Kind (class / ...
How do I convert seconds to hours, minutes and seconds?
...ample, if you want to omit a field when printing, use this: stackoverflow.com/questions/7999935/…
– eric_kernfeld
Oct 10 '18 at 15:40
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How do I log errors and warnings into a file?
...ror_log /home/path/public_html/domain/PHP_errors.log. See perishablepress.com/…
– Matthieu
Jan 8 '14 at 8:47
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How to tell PowerShell to wait for each command to end before starting the next?
...
Normally, for internal commands PowerShell does wait before starting the next command. One exception to this rule is external Windows subsystem based EXE. The first trick is to pipeline to Out-Null like so:
Notepad.exe | Out-Null
PowerShell wi...
Git diff output to file preserve coloring
...any browser so output can be read in Windows etc.
ansi2html code is here: http://www.pixelbeat.org/scripts/ansi2html.sh
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How to use HttpWebRequest (.NET) asynchronously?
How can I use HttpWebRequest (.NET, C#) asynchronously?
8 Answers
8
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MySQL “NOT IN” query
...e carefull NOT IN is not an alias for <> ANY, but for <> ALL!
http://dev.mysql.com/doc/refman/5.0/en/any-in-some-subqueries.html
SELECT c FROM t1 LEFT JOIN t2 USING (c) WHERE t2.c IS NULL
cant' be replaced by
SELECT c FROM t1 WHERE c NOT IN (SELECT c FROM t2)
You must use
SELECT...