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Set UILabel line spacing
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Edit: Evidently NSAttributedString will do it, on iOS 6 and later. Instead of using an NSString to set the label's text, create an NSAttributedString, set attributes on it, then set it as the .attributedText on the label. The code you want will be something like this:
NSMutableAt...
Why doesn't Dictionary have AddRange?
... because no one ever designed, specified, implemented, tested, documented and shipped that feature. - @Gabe Moothart
As to why? Well, likely because the behavior of merging dictionaries can't be reasoned about in a manner that fits with the Framework guidelines.
AddRange doesn't exist because a ...
Are arrays passed by value or passed by reference in Java? [duplicate]
...re objects1. Every Java array type has java.lang.Object as its supertype, and inherits the implementation of all methods in the Object API.
... so are they passed by value or by reference? Does it depend on what the array contains, for example references or a primitive type?
Short answers: ...
What's the standard way to work with dates and times in Scala? Should I use Java types or there are
What's the standard way to work with dates and times in Scala? Should I use Java types such as java.util.Date or there are native Scala alternatives?
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How can I preview a merge in git?
I have a git branch (the mainline, for example) and I want to merge in another development branch. Or do I?
11 Answers
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How can I pass a list as a command-line argument with argparse?
I am trying to pass a list as an argument to a command line program. Is there an argparse option to pass a list as option?
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select and update database record with a single queryset
How do I run an update and select statements on the same queryset rather than having to do two queries:
- one to select the object
- and one to update the object
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When to use single quotes, double quotes, and backticks in MySQL
I am trying to learn the best way to write queries. I also understand the importance of being consistent. Until now, I have randomly used single quotes, double quotes, and backticks without any real thought.
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Check whether a string is not null and not empty
How can I check whether a string is not null and not empty?
31 Answers
31
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Validate that a string is a positive integer
...ng(n) === str && n >= 0;
}
or if you want to allow whitespace and leading zeros:
function isNormalInteger(str) {
str = str.trim();
if (!str) {
return false;
}
str = str.replace(/^0+/, "") || "0";
var n = Math.floor(Number(str));
return n !== Infinity &am...