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Category Archives: Programming
On Ubuntu 16.04 running pharo, from the Moose Technology download, results in the following error: unknown option: -plugins To fix, change: # execute exec “$LINUX/pharo” \ -plugins “$LINUX” \ -encoding utf8 \ -vm-display-X11 \ “$image” To: # execute exec “$LINUX/pharo” … Continue reading
Error on ‘inverse_transform’ of LabelEncoder
If you get the following error when calling inverse_transform on sklearn.preprocessing.LabelEncoder ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all() You could be passing in a numpy.ndarray of strings, not numeric … Continue reading
Grails Bootstrap Form Field Error Template
Define a Grails template in /layouts/_formFieldError.gsp <div class=”form-group has-error”> <g:hasErrors bean=”${fieldModel}” field=”${fieldName}”> <div class=”errors”> <g:eachError bean=”${fieldModel}” field=”${fieldName}”> <span class=”help-block”><g:message error=”${it}”/></span> </g:eachError> </div> </g:hasErrors> </div> Usage <g:render template=”/layouts/formFieldError” model=”[fieldModel: myModelObject, fieldName: ‘myFieldName’]” />
Making Sure Our Technical Communities Are Safe Spaces For All
The number of technical user groups in South Africa has grown and we’ve now got several vibrant communities. Which is awesome! If we want to make sure our communities continue to be as awesome and welcoming as they are, we need … Continue reading
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AngularJS – Format Cents As Monetary Unit (Dollars, Rand etc)
1. Create a filter app.filter(’MonetaryUnit’, function () { return function (amount) { return (amount / 100).toFixed(2); } });app.filter(‘MonetaryUnit’, function () { return function (amount) { return (amount / 100).toFixed(2); } }); 2. Apply filter to field {{someField | MonetaryUnit}}{{someField | … Continue reading
May Jozi JUG – Code Dojo and Open Source Contributions
The Jozi JUG is hosting their May event on Monday the 26th. There will be two tracks on the evening, so there’s something for everyone. What are you waiting for? RSVP today! A big thank to Oracle for hosting and … Continue reading
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HMAC SHA512 in Java
When doing some research on authentication tokens I came across the post Don’t Hash Secrets and learn’t of a few new things, one of which was HMAC: Hash-based message authentication code. I use Google Guava for some utility functions, but … Continue reading
Submit HTML form using AngularJS
The payment gateway I’m integrating with requires a post from a form to navigate to their payment page. Some of the information I need to post is dependent on the results from a call to my back end server. My … Continue reading
Xamarin View Fails To Bind To Model
MvxBind:Warning: 9.81 Unable to bind: source property source not found Property:SomeObject on null-objectMvxBind:Warning: 9.81 Unable to bind: source property source not found Property:SomeObject on null-object One of the causes of the above error is mixing up the order of base.OnCreate … Continue reading
5 Minute NLog Wrapper: Limiting The Number Of Emails Sent
If you’re using an Email target to send notifications when an error occurs, it may be useful to limit the frequency of those emails. One way of achieving this is to wrap your target that sends email in a Wrapper … Continue reading
