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How to check if the user can go back in browser history or not
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This will not work if you are coming from a secure (HTTPS) page to an insecure page (HTTP), as that will strip the referrer.
– Kevin Borders
Apr 7 '15 at 15:31
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Call one constructor from another
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@ivan_pozdeev: Yes, you can; use ?: or call a static method.
– SLaks
Oct 12 '14 at 1:17
3
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Why is the Android emulator so slow? How can we speed up the Android emulator? [closed]
...ew Software" menu, then just add a new Update Site with the following URL: http://plugins.genymotion.com/eclipse. Follow the steps indicated by Eclipse.
This emulator is fast and responsive.
GenyMotion allows you to control various sensors of your device including the battery level, signal stren...
Why is there “data” and “newtype” in Haskell? [duplicate]
...can be evaluated as long as you don't try to peek inside.
Couldn't the compiler handle this for itself.
No, not really—this is a case where as the programmer you get to decide whether the constructor is strict or lazy. To understand when and how to make constructors strict or lazy, you have...
Remove refs/original/heads/master from git repo after filter-branch --tree-filter?
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
undefined reference to `WinMain@16'
...>
int main()
{
MessageBox( 0, "Blah blah...", "My Windows app!", MB_SETFOREGROUND );
}
Now let's build it using GNU toolchain (i.e. g++), no special options. Here gnuc is just a batch file that I use for that. It only supplies options to make g++ more standard:
C:\test> gnuc x.cpp
C:...
How do I raise the same Exception with a custom message in Python?
...Note that you can add whatever you like to err. For example err.problematic_array=[1,2,3].
Edit: @Ducan points in a comment the above does not work with python 3 since .message is not a member of ValueError. Instead you could use this (valid python 2.6 or later or 3.x):
try:
try:
raise...
Is it valid to have a html form inside another html form?
...rohibitions", states that:
"form must not contain other form elements."
http://www.w3.org/TR/xhtml1/#prohibitions
As for the older HTML 3.2 spec,
the section on the FORMS element states that:
"Every form must be enclosed within a
FORM element. There can be several
forms in a single docum...
Python exit commands - why so many and when should each be used?
...ution. The choices I've found are: quit() , exit() , sys.exit() , os._exit()
4 Answers
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Regular Expression to match only alphabetic characters
...tch alpha-chars in all Unicode alphabet languages. Easy peasy.
More info:
http://en.wikipedia.org/wiki/Regular_expression#Character_classes
http://ruby-doc.org/core-2.0/Regexp.html
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