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Why is [1,2] + [3,4] = “1,23,4” in JavaScript?
...t defined for arrays.
What happens is that Javascript converts arrays into strings and concatenates those.
Update
Since this question and consequently my answer is getting a lot of attention I felt it would be useful and relevant to have an overview about how the + operator behaves in general als...
Why isn't String.Empty a constant?
In .Net why is String.Empty read only instead of a constant? I'm just wondering if anyone knows what the reasoning was behind that decision.
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How can I parse a CSV string with JavaScript, which contains comma in data?
I have the following type of string
17 Answers
17
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String.equals versus == [duplicate]
This code separates a string into tokens and stores them in an array of strings, and then compares a variable with the first home ... why isn't it working?
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Is String.Format as efficient as StringBuilder
Suppose I have a stringbuilder in C# that does this:
12 Answers
12
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How to get device make and model on iOS?
...e currentdevice is? I know it's possible to get the model through
NSString *deviceType = [[UIDevice currentDevice] model];
which will just return whether I have an "iPhone" or an "iPod", BUT I was wondering if it's possible to detect/know if I have an iPhone 3GS vs. and iPhone 4 vs. an iPho...
Why does instanceof return false for some literals?
...eated from within Javascript. From the Mozilla API docs:
var color1 = new String("green");
color1 instanceof String; // returns true
var color2 = "coral";
color2 instanceof String; // returns false (color2 is not a String object)
I can't find any way to construct primitive types with code, perhap...
How do I create an array of strings in C?
I am trying to create an array of strings in C. If I use this code:
14 Answers
14
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How to convert String to Long in Kotlin?
So, due to lack of methods like Long.valueOf(String s) I am stuck.
11 Answers
11
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Why is the String class declared final in Java?
From when I learned that the class java.lang.String is declared as final in Java, I was wondering why that is. I didn't find any answer back then, but this post: How to create a replica of String class in Java? reminded me of my query.
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