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TypeError: 'NoneType' object is not iterable in Python
...s not None, but to let the exception occur. You want the consumers of your API to know when they've used it incorrectly. Accepting None as an empty sequence would let mistakes like mylist = mylist.extend(morestuff), manage to hide even longer; they think they extended a list (and they did, but then ...
Is there a way to create xxhdpi, xhdpi, hdpi, mdpi and ldpi drawables from a large scale image?
...t, you will also need an hdpi one, as neither xhdpi nor xxhdpi existed for API Level 7 and below. Now, whether you like the look of your downsampled drawables is another matter entirely...
– CommonsWare
Aug 31 '14 at 19:34
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Weird Integer boxing in Java
...afc there is no other way to unbox an Integer than via the official public API, i.e. calling intValue(). But there are other possible ways to get an Integer instance for an int value, e.g. a compiler may generate code keeping and reusing previously created Integer instances.
– ...
Row count with PDO
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it is useful if the API needs to print out the total results of a search query. it will only give you 10 or 15 rows back, but it also should tell you that there are 284 total results.
– Andres SK
Jun 3 '13 ...
Where can I find documentation on formatting a date in JavaScript?
...til now I was under the impression that JavaScript doesn't have a built-in API to format a date object into a string." but then talks about the behavior, that I believe he thinks is native in javascript. Without knowing which library he mistakenly references, I think the best guess is that he's aski...
Dynamic validation and name in a form with AngularJS
...d) and the suggested approach by the angular team (from docs.angularjs.org/api/ng.directive:form): "Since you cannot dynamically generate the name attribute of input elements using interpolation, you have to wrap each set of repeated inputs in an ngForm directive and nest these in an outer form elem...
'Static readonly' vs. 'const'
... @didibus Changing a field to a property does, in fact, break the API. A field in C# effectively acts like a variable, while a property in C# is a syntax helper for writing a getter method and/or a setter method. This difference is important when other assemblies are involved. If you change...
Best way of invoking getter by reflection
...ever, there are a lot of libraries that extend and simplify the java.beans API. Commons BeanUtils is a well known example. There, you'd simply do:
Object value = PropertyUtils.getProperty(person, "name");
BeanUtils comes with other handy stuff. i.e. on-the-fly value conversion (object to string, ...
How may I reference the script tag that loaded the currently-executing script?
...elegant. There's an example of it in the new Google Charts/Visualizations API if you unpack the javascript. They load JSON data from within the script tag, see: ajax.googleapis.com/ajax/static/modules/gviz/1.0/chart.js
– Jason Thrasher
Nov 17 '10 at 23:13
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html5 - canvas element - Multiple layers
...e by using html elements to draw something in the first place. Because our api returned x,y,width and height, we moved to jscanavs to draw the image instead of using html elements. Mind you we did have couple of issues with rotation (starting points were a bit awkward and unpredictable) and applying...