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MySQL ON vs USING?
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The JOIN ON clause using a custom projection
Traditionally, when writing an INNER JOIN or LEFT JOIN query, we happen to use the ON clause to define the join con...
Hidden Features of PHP? [closed]
...is quite difficult to do in most other languages.
For example with the MS-Excel Stream handler you can create a MS Excel file in the following way:
$fp = fopen("xlsfile://tmp/test.xls", "wb");
if (!is_resource($fp)) {
die("Cannot open excel file");
}
$data= array(
array("Name" => "Bo...
A simple explanation of Naive Bayes Classification
...t number, and you are done.
Despite the name, Naive Bayes turns out to be excellent in certain applications. Text classification is one area where it really shines.
Hope that helps in understanding the concepts behind the Naive Bayes algorithm.
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How to read a CSV file into a .NET Datatable
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Here's an excellent class that will copy CSV data into a datatable using the structure of the data to create the DataTable:
A portable and efficient generic parser for flat files
It's easy to configure and easy to use. I urge you to...
reading from app.config file
...ion.ConfigurationFile i get C:\\Program Files\\Microsoft Office\\OFFICE11\\exCEL.EXE.config which is not my config file... what should i do
– Sathish
Mar 8 '10 at 8:58
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What is the difference between sigaction and signal?
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Excellent sigaction() demo from GCC themselves: gnu.org/software/libc/manual/html_node/…; and excellent signal() demo from GCC themselves: gnu.org/software/libc/manual/html_node/…. Notice that in the signal demo they avoi...
Keep only date part when using pandas.to_datetime
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pd.to_datetime(df['Date'], utc=False)
You will be able to save it in excel without getting the error "ValueError: Excel does not support datetimes with timezones. Please ensure that datetimes are timezone unaware before writing to Excel."
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Using .NET, how can you find the mime type of a file based on the file signature not the extension
...},
{"xhtml", "application/xhtml+xml"},
{"xls", "application/vnd.ms-excel"},
{"xml", "application/xml"},
{"xpm", "image/x-xpixmap"},
{"xsl", "application/xml"},
{"xlsx","application/vnd.openxmlformats-officedocument.spreadsheetml.sheet"},
{"xltx","a...
How to show multiline text in a table cell
...rap our content works fine, but due to the use of this table (exporting to excel), large #s of columns and rows balloon the size of the exported file and cause excel to crash upon reading the file. (odd, I know). Has anyone else seen this or have an idea for a solution?
– JoeBr...
Ruby off the rails
... exist for this purpose.
I highly recommend Googling "ruby dsl" for some excellent reading, but I would like to leave you with one post in particular. Russ Olsen wrote a two part blog post on DSLs. I saw him give a presentation on DSLs and it was very good. I highly recommend reading these posts.
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