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How to get the number of Characters in a String?
...ust type casting.
len([]rune("世界")) will print 2. At leats in Go 1.3.
And with CL 108985 (May 2018, for Go 1.11), len([]rune(string)) is now optimized. (Fixes issue 24923)
The compiler detects len([]rune(string)) pattern automatically, and replaces it with for r := range s call.
Adds a new run...
How do I reference an existing branch from an issue in GitHub?
Let's say I have a branch named feature/1 . And also issue #1. I want to link that branch to that issue.
5 Answers
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Detect iPad users using jQuery?
...avoid performing browser-specific detection as it can often be unreliable (and can be spoofed). It's preferred to use actual feature-detection in most cases, which can be done through a library like Modernizr.
As pointed out in Brennen's answer, issues can arise when performing this detection withi...
In Rails, how do you render JSON using a view?
Suppose you're in your users controller and you want to get a json response for a show request, it'd be nice if you could create a file in your views/users/ dir, named show.json and after your users#show action is completed, it renders the file.
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How does one write code that best utilizes the CPU cache to improve performance?
...aiting for a memory request to be fulfilled (avoiding the memory latency), and as a second effect, possibly to reduce the overall amount of data that needs to be transfered (preserving memory bandwidth).
Techniques for avoiding suffering from memory fetch latency is typically the first thing to con...
Batch renaming files with Bash
... to remove their version numbers? I've been toying around with both expr and %% , to no avail.
10 Answers
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How can I String.Format a TimeSpan object with a custom format in .NET?
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Please note: this answer is for .Net 4.0 and above. If you want to format a TimeSpan in .Net 3.5 or below please see JohannesH's answer.
Custom TimeSpan format strings were introduced in .Net 4.0. You can find a full reference of available format specifiers at th...
What is the “reactor” in Maven?
I've been reading about Maven reactor and am confused by its terminology usage. I've read that a multi-module is a reactor, that you can manipulate the maven reactor and that the reactor is a plugin. What exactly is the reactor?
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How to create a temporary directory/folder in Java?
Is there a standard and reliable way of creating a temporary directory inside a Java application? There's an entry in Java's issue database , which has a bit of code in the comments, but I wonder if there is a standard solution to be found in one of the usual libraries (Apache Commons etc.) ?
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How to implement __iter__(self) for a container object (Python)
... to the sequence.
The following will create an iterator that yields five, and then every item in some_list.
def __iter__(self):
yield 5
yield from some_list
Pre-3.3, yield from didn't exist, so you would have to do:
def __iter__(self):
yield 5
for x in some_list:
yield x
...