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How to access component methods from “outside” in ReactJS?
...the component instance. You can pass a ref callback in when rendering the root of the component to get the instance, like so:
// React code (jsx)
function MyWidget(el, refCb) {
ReactDOM.render(<MyComponent ref={refCb} />, el);
}
export default MyWidget;
and:
// vanilla javascript code...
super() raises “TypeError: must be type, not classobj” for new-style class
...
super() can be used only in the new-style classes, which means the root class needs to inherit from the 'object' class.
For example, the top class need to be like this:
class SomeClass(object):
def __init__(self):
....
not
class SomeClass():
def __init__(self):
....
sendmail: how to configure sendmail on ubuntu? [closed]
...t the following, matching up to your smtp server:
AuthInfo:your.isp.net "U:root" "I:user" "P:password"
#Generate the Authentication database, make both files readable only by root
makemap hash client-info < client-info
chmod 600 client-info
cd ..
Add the following lines to sendmail.mc, but bef...
Git Push ERROR: Repository not found
...
The .git/ directory can be found on the project's root directory.
– Gui Imamura
Aug 5 '15 at 19:28
...
Command not found when using sudo
...un a command using sudo you are effectively running it as the superuser or root.
The reason that the root user is not finding your command is likely that the PATH environment variable for root does not include the directory where foo.sh is located. Hence the command is not found.
The PATH enviro...
What is the length of the access_token in Facebook OAuth2?
...
MySQL requires an upper-bound on this. Please give a realistic upperbound. e.g. 1000 characters, 10,000 characters, 1,000,000,000 characters? Having no upper-bound is just unreasonable.
– Yahya Uddin
...
How can I connect to Android with ADB over TCP? [closed]
...
Manual Process
From your device, if it is rooted
According to a post on xda-developers, you can enable ADB over Wi-Fi from the device with the commands:
su
setprop service.adb.tcp.port 5555
stop adbd
start adbd
And you can disable it and return ADB to listening on U...
When to use reinterpret_cast?
...ions to (IEEE 754) floats. One example of this was the Fast Inverse Square-Root trick:
https://en.wikipedia.org/wiki/Fast_inverse_square_root#Overview_of_the_code
It treats the binary representation of the float as an integer, shifts it right and subtracts it from a constant, thereby halving and n...
How to enable PHP's openssl extension to install Composer?
...\v1.0\;C:\Program files\Microsoft\Web Platform Installer\;C:\Program Files\MySQL\MySQL Server 5.5\bin.. there isn't any php installed in any of those directories.. what do i do now?
– abbood
Mar 11 '14 at 10:36
...
Dealing with multiple Python versions and PIP?
...get-pip.py
Use specific pip version to install packages:
pip2.7 install mysql-connector-python --allow-external mysql-connector-python
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