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add column to mysql table if it does not exist
...support MySQL 4.1, this solution isn't good.
One solution used by frameworks that use database migrations is to record in your database a revision number for the schema. Just a table with a single column and single row, with an integer indicating which revision is current in effect. When you upda...
Change x axes scale in matplotlib
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Try using matplotlib.pyplot.ticklabel_format:
import matplotlib.pyplot as plt
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plt.ticklabel_format(style='sci', axis='x', scilimits=(0,0))
This applies scientific notation (i.e. a x 10^b) to your x-axis tickmarks
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Comment out text in R Markdown (Rmd file)
In an R Markdown ( .Rmd ) file, how do you comment out unused text? I'm not referring to the text in the R code chunk, but the general texts, like % in LaTex for example.
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Clearing coverage highlighting in Eclipse
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Click the "Remove all Sessions" button in the toolbar of the "Coverage" view.
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How to get the date from jQuery UI datepicker
I want to get the date from datepicker whenever user choose the date in jQuery UI datepicker and click the button on the form.
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How do you automatically resize columns in a DataGridView control AND allow the user to resize the c
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This trick works for me:
grd.DataSource = DT;
//set autosize mode
grd.Columns[0].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
grd.Columns[1].AutoSizeMode = DataGridViewAutoSizeColumnMode.AllCells;
grd.Columns[2].AutoSizeM...
Is there a way to make a PowerShell script work by double clicking a .ps1 file?
...o my team. The script is to fetch an IP address from the Vsphere client, make an mstsc connection, and log it in a shared file.
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Disabling Minimize & Maximize On WinForm?
...What I want to be able to do is to remove the minimize and maximize, while keeping the close.
7 Answers
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Does a UNIQUE constraint automatically create an INDEX on the field(s)?
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A unique key is a special case of index, acting like a regular index with added checking for uniqueness. Using SHOW INDEXES FROM customer you can see your unique keys are in fact B-tree type indexes.
A composite index on (email, user...
How to convert boost path type to string?
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