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MySQL Error 1215: Cannot add foreign key constraint
...y are primary keys in their own tables. I have done both of these things, if I'm not mistaken. Any other help you guys could offer?
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Making heatmap from pandas DataFrame
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If you don't need a plot per say, and you're simply interested in adding color to represent the values in a table format, you can use the style.background_gradient() method of the pandas data frame. This method colorizes the ...
How can I connect to MySQL in Python 3 on Windows?
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if you want to use MySQLdb first you have to install pymysql on your pc by typing in cmd of windows
pip install pymysql
then in python shell, type
import pymysql
pymysql.install_as_MySQLdb()
import MySQLdb...
How to set size for local image using knitr for markdown?
... for all document formats that knitr supports, so you do not need to think if you have to use, for example, LaTeX or Markdown syntax, to embed an external image. Chunk options related to graphics output that work for normal R plots also work for these images, such as out.width and out.height.
Examp...
Convert Bitmap to File
...o be done in background (NOT IN THE MAIN THREAD) it hangs the UI specially if the bitmap was large
File file;
public class fileFromBitmap extends AsyncTask<Void, Integer, String> {
Context context;
Bitmap bitmap;
String path_external = Environment.getExternalStorageDirectory() +...
Proper way to exit iPhone application?
...Don't do that" is never the correct answer. Give warnings and disclaimers if you like, but the only correct answer to "how do I do this" is "here's how to do it". If I'm searching for how to do something (maybe I want to force it to exit while debugging), people righteously declaring "you don't!" ...
How to subtract 30 days from the current datetime in mysql?
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SELECT * FROM table
WHERE exec_datetime BETWEEN DATE_SUB(NOW(), INTERVAL 30 DAY) AND NOW();
http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html#function_date-add
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WebDriver: check if an element exists? [duplicate]
How to check if an element exist with web driver?
10 Answers
10
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Get the time difference between two datetimes
I know I can do anything and some more envolving Dates with momentjs. But embarrassingly, I'm having a hard time trying to do something that seems simple: geting the difference between 2 times.
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How can I stop .gitignore from appearing in the list of untracked files?
...d and so on.
So, add it to your repository, it should not be gitignored.
If you really want you can add .gitignore to the .gitignore file if you don't want it to be committed. However, in that case it's probably better to add the ignores to .git/info/exclude, a special checkout-local file that wor...