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Best way to select random rows PostgreSQL
I want a random selection of rows in PostgreSQL, I tried this:
12 Answers
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How to declare std::unique_ptr and what is the use of it?
I try to understand how std::unique_ptr works and for that I found this document. The author starts from the following example:
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Check whether HTML element has scrollbars
... fails in many cases. If your element has overflow: visible; width: 200px; and has a child with a 500px width, your element has no scroll bars but has a scrollWidth of 500px and a clientWidth of 200px.
– Joseph Lennox
Mar 5 '14 at 21:17
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javac not working in windows command prompt
I'm trying to use javac with the windows command prompt, but it's not working.
17 Answers
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How do I undo 'git add' before commit?
I mistakenly added files to Git using the command:
36 Answers
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Overriding superclass property with different type in Swift
...properties. Instead you can create an extra variable in the subclass that handles the new class type:
class Chassis {}
class RacingChassis : Chassis {}
class Car {
var chassis = Chassis()
}
class RaceCar: Car {
var racingChassis = RacingChassis()
override var chassis: Chassis {
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How to jump from Intellij terminal to editor with shortcut
...ention, I wanted to remind everyone that you can toggle between the editor and the terminal window easily enough with a built in action. By default it is mapped to Alt+F12 and ⌥F12. To check other mappings, view it in the menu at View > Tool Windows > Terminal. Alternatively go to the Workin...
Sublime Text 3 how to change the font size of the file sidebar?
Though I have tried to modify "font.size" in classes like "Label_control" and "sidebar_control" in the Package "Theme-Default", the font size of the editor does not change at all. Is there anything different in sublime text3？
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How can I maintain fragment state when added to the back stack?
...return to FragmentA (by pressing back), a totally new FragmentA is created and the state it was in is lost. I get the feeling I'm after the same thing as this question, but I've included a complete code sample to help root out the issue:
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“Conversion to Dalvik format failed with error 1” on external JAR
In my Android application in Eclipse I get the following error.
71 Answers
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