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Using Linq to get the last N elements of a collection?
...collection, is there a way to get the last N elements of that collection? If there isn't a method in the framework, what would be the best way to write an extension method to do this?
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Determine installed PowerShell version
...etermine what version of PowerShell is installed on a computer, and indeed if it is installed at all?
19 Answers
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Checking if a list is empty with LINQ
...e "best" (taking both speed and readability into account) way to determine if a list is empty? Even if the list is of type IEnumerable<T> and doesn't have a Count property.
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How do I iterate through the files in a directory in Java?
...
You can use File#isDirectory() to test if the given file (path) is a directory. If this is true, then you just call the same method again with its File#listFiles() outcome. This is called recursion.
Here's a basic kickoff example.
public static void main(String....
iOS: Use a boolean in NSUserDefaults
...ults standardUserDefaults] synchronize];
and read it by using this code:
if(![[NSUserDefaults standardUserDefaults] boolForKey:@"logged_in"]) {
[self displayLogin];
} else {
[self displayMainScreen];
}
share
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Fast Linux File Count for a large number of files
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By default ls sorts the names, which can take a while if there are a lot of them. Also there will be no output until all of the names are read and sorted. Use the ls -f option to turn off sorting.
ls -f | wc -l
Note that this will also enable -a, so ., .., and other files s...
iOS: Compare two dates
...two NSDate and I try with NSOrderAscending and NSOrderDescending but if my date is equal at other two dates?
6 Answer...
How to automatically reload a page after a given period of inactivity
How can I automatically reload a webpage, if there have been no activity on the page for a given period of time?
14 Answers...
How to find indices of all occurrences of one string in another in JavaScript?
...hStr, str, caseSensitive) {
var searchStrLen = searchStr.length;
if (searchStrLen == 0) {
return [];
}
var startIndex = 0, index, indices = [];
if (!caseSensitive) {
str = str.toLowerCase();
searchStr = searchStr.toLowerCase();
}
while ((...
Using os.walk() to recursively traverse directories in Python
..._recurse(self, parent_path, file_list, prefix, output_buf, level):
if len(file_list) == 0 \
or (self.max_level != -1 and self.max_level <= level):
return
else:
file_list.sort(key=lambda f: os.path.isfile(os.path.join(parent_path, f)))
...