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Group a list of objects by an attribute : Java
...student);
}
If you want all the student with particular location details then you can use this:
hashMap.get(locationId);
which will get you all the students with the same the location ID.
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How to install a specific version of a ruby gem?
... If, like me, you have previously installed a later version of your gem, then you must uninstall the later version with e.g. gem uninstall fog. It will ask you which version to uninstall if you have more than one.
– Dizzley
Jan 26 '14 at 18:18
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How to add line break for UILabel?
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Instead of using sizeWithAttributes then setting the frame, you can just call sizeToFit to work-out and set the frame size in one quick step.
– jimmyjudas
Aug 13 '15 at 8:37
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How can I convert comma separated string into a List
...back by Antoine. It calls TryParse first to filter out any bad values, and then Parse to do the actual conversion.
string csv = "1,2,3,4,a,5,0,3,r,5";
int mos = 0;
var intList = csv.Split(',')
.Where(m => int.TryParse(m, out mos))
.Select(m => int.Pars...
How to clean project cache in Intellij idea like Eclipse's clean?
...unning. It is basically the same just go to
File -> Invalidate caches, then restart Intellij
or
File -> Invalidate caches / Restart
The main difference is that in older versions you had to manually restart as cache files are not removed until you restart. The newer versions will ask if you a...
Notepad++ add to every line
... just scroll down to the final line I'm going to select and ctrl+alt+shift then click worked exactly like I hoped it would.
– Denial
Jun 30 '16 at 17:16
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In C++, what is a virtual base class?
...- not an object layout. The confusing part is that if we do use virtual, then the object layout looks like the diamond; and if we do not use virtual then the object layout looks like a tree structure that contains two As
– M.M
Jul 23 '15 at 4:19
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How can I make SQL case sensitive string comparison on MySQL?
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@StevenB: Click the column's Edit button, then set the Collation --> i.imgur.com/7SoEw.png
– drudge
Apr 12 '11 at 0:50
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Protecting executable from reverse engineering?
...ight time frame.
If you give people a program that they are able to run, then they will also be able to reverse-engineer it given enough time. That is the nature of programs. As soon as the binary is available to someone who wants to decipher it, you cannot prevent eventual reverse-engineering. Af...
Compare two dates with JavaScript
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The Date object will do what you want - construct one for each date, then compare them using the >, <, <= or >=.
The ==, !=, ===, and !== operators require you to use date.getTime() as in
var d1 = new Date();
var d2 = new Date(d1);
var same = d1.getTime() === d2.getTime();
var ...