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How can I programmatically check whether a keyboard is present in iOS app?
... responder. I have a view controller with multiple child view controllers, all of which contain UITextFields. Using this method, i cannot tell from my parent view controller whether the keyboard is shown. The only reliable way is to use the notification method explained in the other answers
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Do Google refresh tokens expire?
...ion of refresh tokens.
Instead of issuing a long lasting token (typically good for a year or unlimited lifetime),
the server can issues a short-lived access token and a long lived refresh token.
So in short you can use refresh tokens again and again until the user who authorized the ac...
What are the differences between vector and list data types in R?
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Technically lists are vectors, although very few would use that term. "list" is one of several modes, with others being "logical", "character", "numeric", "integer". What you are calling vectors are "atomic vectors" in strict R parl...
“Active Directory Users and Computers” MMC snap-in for Windows 7?
...able for use in Windows 7? I just need to browse the membership of some small Active Directory groups that are deep within a huge hierarchy, so I can eventually write code to work with those groups. The Windows Server 2003 version of the installer works, but the resulting MMC snap in just won't st...
Array Size (Length) in C#
...ts out in the comments, there is a concept of a "jagged array", which is really nothing more than a single-dimensional array of (typically single-dimensional) arrays.
For example, one could have the following:
int[][] c = new int[3][];
c[0] = new int[] {1, 2, 3};
c[1] = new int[] {3, 14};
c[2] = ...
Validate that a string is a positive integer
...nclude 0, even though 0 is not positive. I include notes if you want to disallow 0.
Based on Parsing
If you want it to be a normalized decimal integer string over a reasonable range of values, you can do this:
function isNormalInteger(str) {
var n = Math.floor(Number(str));
return n !== I...
How to architect an Ember.js application
...assotti's answer, you should not be doing that for production code. Especially when we have such a powerful and easy to use project like Ember-CLI to show us the Yehuda approved happy path.
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What is the difference between procedural programming and functional programming? [closed]
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A functional language (ideally) allows you to write a mathematical function, i.e. a function that takes n arguments and returns a value. If the program is executed, this function is logically evaluated as needed.1
A procedural language, on the other ...
Can I call jquery click() to follow an link if I haven't bound an event handler to it with bind
...ger() and window.location also, and I can make it work as intended with all three.
10 Answers
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When should a class be Comparable and/or Comparator?
... Comparable means "I can compare myself with another object." This is typically useful when there's a single natural default comparison.
Implementing Comparator means "I can compare two other objects." This is typically useful when there are multiple ways of comparing two instances of a type - e.g....