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Difference between HashSet and HashMap?
...act that HashSet does not allow duplicate values, what is the difference between HashMap and HashSet ?
19 Answers
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Best database field type for a URL
I need to store a url in a MySQL table. What's the best practice for defining a field that will hold a URL with an undetermined length?
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Can a CSV file have a comment?
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The CSV "standard" (such as it is) does not dictate how comments should be handled, no, it's up to the application to establish a convention and stick with it.
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Reset PHP Array Index
... array(
3 => "Hello",
7 => "Moo",
45 => "America"
);
$b = array_values($a);
print_r($b);
Array
(
[0] => Hello
[1] => Moo
[2] => America
)
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impro...
Get type of all variables
In R, I'd like to retrieve a list of global variables at the end of my script and iterate over them. Here is my code
6 Answ...
Copy and paste content from one file to another file in vi
...into another file. I know how to copy (yy) and paste (p) in the same file. But that doesn't work for different files. How is this done?
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What is the purpose of the HTML “no-js” class?
I notice that in a lot of template engines, in the HTML5 Boilerplate , in various frameworks and in plain php sites there is the no-js class added onto the <HTML> tag.
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How can I extend typed Arrays in Swift?
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For extending typed arrays with classes, the below works for me (Swift 2.2). For example, sorting a typed array:
class HighScoreEntry {
let score:Int
}
extension Array where Element == HighScoreEntry {
func sort() -> [HighScoreEntry] {
return sort { $...
Python mysqldb: Library not loaded: libmysqlclient.18.dylib
I just compiled and installed mysqldb for python 2.7 on my mac os 10.6. I created a simple test file that imports
15 Answe...
What's the best practice to “git clone” into an existing folder?
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This can be done by cloning to a new directory, then moving the .git directory into your existing directory.
If your existing directory is named "code".
git clone https://myrepo.com/git.git temp
mv temp/.git code/.git
rm -rf temp
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