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Get current date/time in seconds
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@Nick - I think all examples are necessarily speculative and will sound contrived - but I'll take a shot :) Suppose you have data time stamped with unix time, and want to determine it's age. More though I think this is what is most likely me...
How do I create a foreign key in SQL Server?
...mportant point to note that is creating the foreign key does not create an index. Joining another table to this one could result in an extremely slow query.
– Rocklan
Sep 5 '14 at 0:13
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How do you find all subclasses of a given class in Java?
...ava Reflections API.
A project exists that does the necessary scanning and indexing of your classpath so you can get access this information...
Reflections
A Java runtime metadata analysis, in the spirit of Scannotations
Reflections scans your classpath, indexes the metadata, allows you to query it...
Javascript add leading zeroes to date
... Very nice way of doing it. I think the accepted answer is really nice, but this even cleaner in my opinion
– Binke
Jan 19 '16 at 10:52
1
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How to get the previous URL in JavaScript?
...ious page
history.forward(); //Go to the next page in the stack
history.go(index); //Where index could be 1, -1, 56, etc.
But you can't manipulate the content of the history stack on browser that doesn't support the HTML5 History API
For more information see the doc
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How to do a recursive find/replace of a string with awk or sed?
... on a folder including a git repo - changes to .git could corrupt your git index.
find /home/www/ -type f -exec \
sed -i 's/subdomainA\.example\.com/subdomainB.example.com/g' {} +
Compared to other answers here, this is simpler than most and uses sed instead of perl, which is what the origina...
MySQL JOIN the most recent row only?
... main table, and testing with a where condition that selects 1000 records. Indexes are optimal.
– Timo
Dec 4 '15 at 9:14
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Count the number of occurrences of a string in a VARCHAR field?
...rough text that also has words with capitalized letters (like German where all nouns are written with capitalized letter). The REPLACE only replaces exact matches. To consider all words you need to change the replace above to: LENGTH( REPLACE ( LOWER(description), "value", "") ) and make sure that "...
How do you delete a column by name in data.table?
... tried grepl() initally and it didn't work, as data.table columns can't be indexed by a logical vector. But I now realize that grepl() can be made to work by wrapping it with which(), so that it returns an integer vector.
– Josh O'Brien
Feb 8 '12 at 23:38
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Styling HTML email for Gmail
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}
</style>
<xml>
<o:OfficeDocumentSettings>
<o:AllowPNG/>
<o:PixelsPerInch>96</o:PixelsPerInch>
</o:OfficeDocumentSettings>
</xml>
<![endif]-->
This is just a simple example, but, who know, it might come in handy some time.
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