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“Invalid form control” only in Google Chrome
...below works well in Safari but in Chrome and Firefox the form will not submit. Chrome console logs the error An invalid form control with name='' is not focusable . Any ideas?
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Multiline strings in JSON
I'm writing some data files in JSON format and would like to have some really long string values split over multiple lines. Using python's JSON module I get a whole lot of errors, whether I use \ or \n as an escape.
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Declaring pointers; asterisk on the left or right of the space between the type and name? [duplicate
...ointers in one of two ways, and I have no idea which one is correct, of if it even matters.
6 Answers
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Why does Apple recommend to use dispatch_once for implementing the singleton pattern under ARC?
... (sharedInstance == nil) {
sharedInstance = [[MyClass alloc] init];
}
}
return sharedInstance;
}
The benefit of dispatch_once() over this is that it's faster. It's also semantically cleaner, because it also protects you from multiple threads doing alloc init of your sha...
Style input element to fill remaining width of its container
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as much as everyone hates tables for layout, they do help with stuff like this, either using explicit table tags or using display:table-cell
<div style="width:300px; display:table">
<label for="MyInput" style="display:table-cell; width:1px">label&nbsp;text</la...
Why can't I have abstract static methods in C#?
I've been working with providers a fair bit lately, and I came across an interesting situation where I wanted to have an abstract class that had an abstract static method. I read a few posts on the topic, and it sort of made sense, but is there a nice clear explanation?
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Difference between Service, Async Task & Thread?
...iption about them, I won't repeat them, instead I will try to give answer with my own words, hope they will help you.
Service is like an Activity but has no user interface. Probably if you want to fetch the weather for example you won't create a blank activity for it, for this you will use a Servi...
Is there a way to avoid null check before the for-each loop iteration starts? [duplicate]
Every time I have to iterate over a collection I end up checking for null, just before the iteration of the for-each loop starts. Like this:
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What algorithms compute directions from point A to point B on a map?
...s working at a mapping company, which included working on the routing algorithm... yes, Dijkstra's does work, with a couple of modifications:
Instead of doing Dijkstra's once from source to dest, you start at each end, and expand both sides until they meet in the middle. This eliminates roughly ha...
Where and why do I have to put the “template” and “typename” keywords?
...r can yield vastly different interpretations depending on what t means. If it's a type, then it will be a declaration of a pointer f. However if it's not a type, it will be a multiplication. So the C++ Standard says at paragraph (3/7):
Some names denote types or templates. In general, whenever a...