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Replace None with NaN in pandas dataframe
...ata from an SQL database, you can combine this with the answer below. This converts None (which isn't a string) to NaN. Then you can df['column'].replace(nan, "", inplace=True) if say you wanted None to be empty string.
– VISQL
Jul 4 '18 at 12:52
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How do I close a connection early?
...ot of useful things in the context of a query, such as saving the session, converting the downloaded video, handling all kinds of statistics, etc.
fastcgi_finish_request() can invoke executing shutdown function.
Note: fastcgi_finish_request() has a quirk where calls to flush, print, or echo will...
runOnUiThread in fragment
I'm trying to convert an Activity to fragment. The error mark on runOnUiThread .
on the past:
6 Answers
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How to fix the “java.security.cert.CertificateException: No subject alternative names present” error
...AAA.BBB.CCC.DDD:9443 > certs.txt This will extract certs in PEM format.
Convert the cert into DER format as this is what keytool expects, e.g. openssl x509 -in certs.txt -out certs.der -outform DER
Now you want to import this cert into the system default 'cacert' file. Locate the system default '...
How to check internet access on Android? InetAddress never times out
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Network connection / Internet access
isConnectedOrConnecting() (used in most answers) checks for any network connection
To know whether any of those networks have internet access, use one of the following
A) Ping a Server (easy)
// ICMP
pub...
Getting All Variables In Scope
...ion:
var f = function() {
var x = 0;
console.log(x);
};
You can convert your function to a string:
var s = f + '';
You will get source of function as a string
'function () {\nvar x = 0;\nconsole.log(x);\n}'
Now you can use a parser like esprima to parse function code and find local ...
Internet Explorer 11 disable “display intranet sites in compatibility view” via meta tag not working
I have been working on an intranet website for over 6 months
were I have been using the below html5 doctype and edge compatibility meta tag to force Internet Explorer to not emulate an older browser version, and this has worked ok.
...
How to add a button to PreferenceScreen
... own list), but I resolved it by just creating a Preference and setting an Intent on it. There was no need to create a button (at least in my case)
– Michał K
Nov 1 '12 at 20:56
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How to copy a dictionary and only edit the copy
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It might be better to say "dict2 and dict1 point to the same dictionary", you are not changing dict1 or dict2 but what they point to.
– GrayWizardx
Mar 17 '10 at 21:15
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How to trim leading and trailing white spaces of a string?
...s.
(example: the string value of {"first_name":" I have whitespace "} will convert to "\" I have whitespace \"")
Before you can trim anything, you'll need to remove the extra quotes first:
playground example
// ScrubString is a string that might contain whitespace that needs scrubbing.
type ScrubStr...