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Replacing Pandas or Numpy Nan with a None to use with MysqlDB
...s:
df1 = df.where(pd.notnull(df), None)
Note: this changes the dtype of all columns to object.
Example:
In [1]: df = pd.DataFrame([1, np.nan])
In [2]: df
Out[2]:
0
0 1
1 NaN
In [3]: df1 = df.where(pd.notnull(df), None)
In [4]: df1
Out[4]:
0
0 1
1 None
Note: what you ca...
CodeIgniter: Create new helper?
...o it.
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
if ( ! function_exists('test_method'))
{
function test_method($var = '')
{
return $var;
}
}
Save this to application/helpers/ . We shall call it "new_helper.php"
The first line exists to ...
HTML code for an apostrophe
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My boss just made me change all the single quote on our site to a proper typographic apostrophe. The &#39; is technically not an apostrophe according to a her... however W3C does view it as an apostrophe. I saw to hell with the proper English and ...
Find files and tar them (with spaces)
...
errorproneerrorprone
40177 silver badges1010 bronze badges
...
How do I check if a string is valid JSON in Python?
...SON.
In general, the "Pythonic" philosophy for this kind of situation is called EAFP, for Easier to Ask for Forgiveness than Permission.
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How to require a fork with composer
...he most common (and easier) way of doing it is using a VCS repository.
All you have to do is add your fork as a repository and update the
version constraint to point to your custom branch. Your custom branch
name must be prefixed with dev-.
Example assuming you patched monolog to fix a bug...
How can I change my default database in SQL Server without using MS SQL Server Management Studio?
... Obvious to experienced hands but maybe not so to those doing this occasionally. Square brackets optional, if fields represent contiguous text.
– iokevins
Jan 10 '19 at 19:26
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Define all functions in one .R file, call them from another .R file. How, if possible?
How do I call functions defined in abc.R file in another file, say xyz.R?
1 Answer
1
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Load a WPF BitmapImage from a System.Drawing.Bitmap
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Would someone consider editing this answer so that all the (correct) comments are integrated into it? At the moment it's heavily upvoted, but not at all clear whether it's the answer or answer+comments that are 'right'...
– Benjol
Apr 25...
Remove element by id
...].map(n => n && n.remove());
These functions are available in all modern browsers (not IE). Read more on MDN.
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