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PermissionUtil is a simple and convenient way of asking for permissions in context. You can easily provide what should happen in case of all requested permissions granted (onAllGranted()), any request was denied (onAnyDenied()) or in case that a rational is needed (onRational()). Anywhere in your A...

By default, routes only respond to GET requests. You can change this behavior by supplying the methods argument to the route() decorator. from flask import request @app.route('/login', methods=['GET', 'POST']) def login(): if request.method == 'POST': do_the_login() else: ...

A feature that has near zero variance is a good candidate for removal. You can manually detect numerical variance below your own threshold: data("GermanCredit") variances<-apply(GermanCredit, 2, var) variances[which(variances<=0.0025)] Or, you can use the caret package to find...

If a feature is largely lacking data, it is a good candidate for removal: library(VIM) data(sleep) colMeans(is.na(sleep)) BodyWgt BrainWgt NonD Dream Sleep Span Gest 0.00000000 0.00000000 0.22580645 0.19354839 0.06451613 0.06451613 0.06451613 Pred ...

Closely correlated features may add variance to your model, and removing one of a correlated pair might help reduce that. There are lots of ways to detect correlation. Here's one: library(purrr) # in order to use keep() # select correlatable vars toCorrelate<-mtcars %>% keep(is.numeric) ...

If you want to match a backslash in your regular expression, you'll have to escape it. Backslash is an escape character in regular expressions. You can use '\\' to refer to a single backslash in a regular expression. However, backslash is also an escape character in Java literal strings. To make a...

The update pattern in D3 version 3 A correct understanding of how the “enter”, “update” and “exit” selections work is fundamental for properly changing the dataviz using D3. Since D3 version 3 (actually, since version 2), this snippet could set the transitions for both “enter” and “update” selecti...

Use the ls() commands to find objects by name: freds = cmds.ls("fred") #finds all objects in the scene named exactly 'fred', ie [u'fred', u'|group1|fred'] Use * as a wildcard: freds = cmds.ls("fred*") # finds all objects whose name starts with 'fred' # [u'fred', u'freder...

Using canvas elements HTML provides the canvas element for building raster-based images. First build a canvas for holding image pixel information. var canvas = document.createElement('canvas'); canvas.width = 500; canvas.height = 250; Then select a context for the canvas, in this case two-di...

The web server serves the user based on the request sent by the browser but how the user will tell the browser what he/she is looking for, that's when we need URL. Every web page on the internet has got a URL that can be bookmarked, copied, shared, and saved for future reference. In single page Back...

To externalise a distributed systems configuration Spring Cloud Config provides server and client-side support needed for externalising and centralising your configuration. To get started quickly you could use Spring Initializr to bootstrap your server. Add the Config Server dependency to automatic...

To get started quickly you could use Spring Initializr to bootstrap your client. Add the Config Client to automatically generate a project with the needed dependencies. Or you could add the dependency manually to an existing Spring Cloud application. <dependency> <groupId>org.spri...

Detailed instructions on getting lambda set up or installed.

Detailed instructions on getting elastic-beanstalk set up or installed.

Introduction The following procedure was tested on a test instance in AWS, with Redhat and Solr 6.1.0. You may need to adjust the process to your operating system and environment accordingly. Prerequisites Make sure you use RedHat or a similar (Fedora-based) OS. cat /etc/redhat-release disp...

To setup JVM options inside elastic beanstalk, your bundle file must be like this: -bundle.zip |--.ebextensions //do not forget the dot at the beginning of the name |--jvm.config |--java_app.jar And, the jvm.config file must be set like this: option_settings: ...

Maximum Path Sum is an algorithm to find out a path such that sum of element(node) of that path is greater than any other path. For example, let's we have a we a triangle as shown below. 3 7 4 2 4 6 8 5 9 3 In above triangle, find the maximum path which has ma...

Using ls() as a filter can sometimes provide produce odd results. If you accidentally forget to pass a filter argument and call ls() with no arguments, you will get a list of every node in the Maya scene: cmds.ls() # [u'time1', u'sequenceManager1', u'hardwareRenderingGlobals', u'renderPartition...

It is common to use a background Thread for doing network operations or long running tasks, and then update the UI with the results when needed. This poses a problem, as only the main thread can update the UI. The solution is to use the runOnUiThread() method, as it allows you to initiate code exe...

Team Foundation Server (commonly abbreviated to TFS) is a Microsoft product that provides source code management (either via Team Foundation Version Control or Git), reporting, requirements management, project management (for both agile software development and waterfall teams), automated builds and...