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What is the best way to check for Internet connectivity using .NET?
...google.com does not return some HTML :)
– Daniel Vassallo
Jan 9 '10 at 1:01
3
@Daniel: true on th...
Pimpl idiom vs Pure virtual class interface
...by "value". Often, doesn't make sense to "copy" instances of the class at all. When it does make sense, a polymorphic "Clone" method is usually more appropriate. Examples: A Socket class, a Database class, a "policy" class, anything that would be a "closure" in a functional language.
Both pImpl ...
How do I install from a local cache with pip?
I install a lot of the same packages in different virtualenv environments. Is there a way that I can download a package once and then have pip install from a local cache?
...
ActiveRecord: size vs count
...l valid.
You'll adapt the function you use depending on your needs.
Basically:
if you already load all entries, say User.all, then you should use length to avoid another db query
if you haven't anything loaded, use count to make a count query on your db
if you don't want to bother with these con...
Filter dataframe rows if value in column is in a set list of values [duplicate]
... regular expressions.
For example, if we want to return a DataFrame where all of the stock IDs which begin with '600' and then are followed by any three digits:
>>> rpt[rpt['STK_ID'].str.contains(r'^600[0-9]{3}$')] # ^ means start of string
... STK_ID ... ...
google chrome extension :: console.log() from background page?
If I call console.log('something'); from the popup page, or any script included off that it works fine.
11 Answers
...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
...
Put servlet class in a package
First of all, put the servlet class in a Java package. You should always put publicly reuseable Java classes in a package, otherwise they are invisible to classes which are in a package, such as the server itself. This way you elimini...
How to convert an Int to a String of a given length with leading zeros to align?
...f"$expr%07d"
f"${expr}%07d"
Edit Apr 2019:
If you want leading spaces, and not zero, just leave out the 0 from the format specifier. In the above case, it'd be f"$expr%7d".Tested in 2.12.8 REPL. No need to do the string replacement as suggested in a comment, or even put an explicit space in fron...
How to create war files
...>
</webinf>
</war>
</target>
Deploy
Finally, you can set up a task to deploy the WAR directly into your Tomcat deploy location:
<target name="deploy">
<copy file="My.war" todir="${tomcat.deploydir}" />
</target>
Click and go!
Once all thi...
Adding an onclick function to go to url in JavaScript?
...
@FayazMd not sure what you're trying to do? Usually if it's JavaScript inside the DOM (currenty inside DOM's element a) as a web page you can not control JS behaviour on the next page (where you're redirecting the browser page). When user leaves the page it's done. Unle...