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Node.js check if file exists
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if (fs.existsSync('/etc/file')) {
console.log('Found file');
}
The API doc says how existsSync work:
Test whether or not the given path exists by checking with the file system.
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Do you have to put Task.Run in a method to make it async?
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So if I have to consume a synchronous external api within a web api controller, I should NOT wrap the synchronous call in Task.Run()? As you said, doing so will keep the initial request thread unblocked but it's using another pool thread to call the external api. In fact ...
How do I avoid capturing self in blocks when implementing an API?
...self;
self.progressBlock = ^(CGFloat percentComplete) {
[dp.delegate myAPI:dp isProcessingWithProgress:percentComplete];
}
The __block keyword marks variables that can be modified inside the block (we're not doing that) but also they are not automatically retained when the block is retained (u...
How to differentiate single click event and double click event?
...uirksmode.org/dom/events/click.html
Or the one provided by jQuery: http://api.jquery.com/dblclick/
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Pretty graphs and charts in Python [closed]
...teractive work, Matplotlib is the mature standard. It provides an OO-style API as well as a Matlab-style interactive API.
Chaco is a more modern plotting library from the folks at Enthought. It uses Enthought's Kiva vector drawing library and currently works only with Wx and Qt with OpenGL on the ...
ActionController::InvalidAuthenticityToken
...verify_authenticity_token, :only => [:index, :show]
Reference: http://api.rubyonrails.org/classes/ActionController/RequestForgeryProtection/ClassMethods.html
Note added by barlop- Rails 4.2 deprecated skip_before_filter in favour of skip_before_action https://guides.rubyonrails.org/4_2_releas...
How to attach my repo to heroku app
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git push
Put empty (blank) when the Git prompt for username, and your API Key for the password. You can get your API Key by showing it from the link below.
https://dashboard.heroku.com/account
Note: You cannot authenticate with the Heroku HTTP Git endpoint using your Heroku username (email) ...
EditText underline below text property
...s on, the color you set won't take effect, instead, it has a focus color.
API Reference:
Drawable#setColorFilter
Drawable#clearColorFilter
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fo...
Explaining Apache ZooKeeper
...present, but can be written above the ZooKeeper primitives.
If the C/Java API is too unwieldy for your purposes, you should rely on libraries built on ZooKeeper such as cages and especially curator.
Where to read more
Official documentation apart, which is pretty good, I suggest to read Chapter 1...
Make a URL-encoded POST request using `http.NewRequest(…)`
I want to make a POST request to an API sending my data as a application/x-www-form-urlencoded content type. Due to the fact that I need to manage the request headers, I'm using the http.NewRequest(method, urlStr string, body io.Reader) method to create a request. For this POST request I append ...