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Define: What is a HashSet?
... elements you can either use an enumerator or use the built-in function to convert the HashSet into a List and iterate through that. Take a look here
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In Vim, how do I apply a macro to a set of lines?
... matching pattern.
:g/pattern/norm! @a
To execute the macro on visually selected lines, press V and the j or k until the desired region is selected. Then type :norm! @a and observe the that following input line is shown.
:'<,'>norm! @a
Enter :help normal in vim to read more.
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What key shortcuts are to comment and uncomment code?
...e Environment -> Keyboard page.
These commands are named Edit.CommentSelection and Edit.UncommentSelection.
(With my settings, these are bound to Ctrl+K, Ctrl+C and Ctrl+K, Ctrl+U. I would guess that these are the defaults, at least in the C++ defaults, but I don't know for sure. The best w...
How to place and center text in an SVG rectangle
...hose
characters who start new lines.
(This approach allows user text
selection across multiple lines of
text -- see Text selection and
clipboard operations.)
Express the
text to be rendered in another XML
namespace such as XHTML [XHTML]
embedded inline within a
‘foreignObject...
How to Validate a DateTime in C#?
...s another variation of the solution that returns true if the string can be converted to a DateTime type, and false otherwise.
public static bool IsDateTime(string txtDate)
{
DateTime tempDate;
return DateTime.TryParse(txtDate, out tempDate);
}
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Count number of days between two dates
... dates.
The one that comes closest is by thatdankent. A full answer would convert to_i and then divide:
(Time.now.to_i - 23.hours.ago.to_i) / 86400
>> 0
(Time.now.to_i - 25.hours.ago.to_i) / 86400
>> 1
(Time.now.to_i - 1.day.ago.to_i) / 86400
>> 1
In the question's specific e...
How To Capture A Minidump: Let Me Count The Ways - C/C++ - 清泛网 - 专注C/C++及内核技术
... in the Applications or the Processes tabs, right click on the process and select Create Dump File.
After the minidump is finished, you’ll see the dialog showing you where the dump was created. A nice hidden treat is that the path shown is a read only edit control you can select and copy so...
Is there “Break on Exception” in IntelliJ?
...reakpoints tab. If that was the last tab you were viewing, it'll still be selected, making it easy to flick breaking on exceptions on and off.
This will cause IntelliJ to break at the point in the code (or library code) where the exception was raised. Specifically, you get a 'first chance' at exc...
How to calculate time difference in java?
...
Just like any other language; convert your time periods to a unix timestamp (ie, seconds since the Unix epoch) and then simply subtract.
Then, the resulting seconds should be used as a new unix timestamp and read formatted in whatever format you want.
Ah...
“Variable” variables in Javascript?
...You can use the JavaScript eval(str) function.
What this function does is convert the string provided into JS code, then executes it.
For example:
eval("console.log('hello world')"); // Logs hello world
So to use it as a variable variable, you can do the following:
var a = "hello";
var hello =...