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How to test if parameters exist in rails
...There but false.
There but an empty string.
as well. Hard to say without more details of your precise situation.
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How do I make a list of data frames?
...rn = "\\.csv$"). You can use regular expressions to match the files, read more about regular expressions in other questions if you need help there. This way you can grab all CSV files even if they don't follow a nice naming scheme. Or you can use a fancier regex pattern if you need to pick certain ...
How to get the Android device's primary e-mail address
...<uses-permission android:name="android.permission.GET_ACCOUNTS" />
More on using AccountManager can be found at the Contact Manager sample code in the SDK.
Method B: Use ContactsContract.Profile (API level 14+)
As of Android 4.0 (Ice Cream Sandwich), you can get the user's email addresses ...
Modulo operator with negative values [duplicate]
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Java recursive Fibonacci sequence
...ry wrong.
The problem is that the it calls fibonacci not 50 times but much more.
At first it calls fibonacci(49)+fibonacci(48),
next fibonacci(48)+fibonacci(47) and fibonacci(47)+fibonacci(46)
Each time it became fibonacci(n) worse, so the complexity is exponential.
The approach to non-recursive ...
push multiple elements to array
...ect you are working on.
In this case, you need a.push.apply(a, [1,2]) (or more correctly Array.prototype.push.apply(a, [1,2]))
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What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?
...rements for __STDC_ISO_10646__.
For platform specific code wchar_t may be more useful. It's essentially required on Windows (e.g., some files simply cannot be opened without using wchar_t filenames), though Windows is the only platform where this is true as far as I know (so maybe we can think of w...
Why should I prefer to use member initialization lists?
...ce is negligible, but imagine if you will that A's default constructor did more, such as allocating memory or opening files. You wouldn't want to do that unnecessarily.
Furthermore, if a class doesn't have a default constructor, or you have a const member variable, you must use an initializer list...
How do I make and use a Queue in Objective-C?
...eue. IMO, following the NSMutableArray behavior of raising an exception is more consistent with Cocoa. After all, you can call -count beforehand to check if there are any objects to dequeue. It's a matter of preference, really.
– Quinn Taylor
Feb 1 '10 at 17:42...
How to resolve git stash conflict without commit?
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This is so much more clear than many blog posts I've read on this topic.
– coder_tim
Aug 21 at 17:57
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