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Why can a function modify some arguments as perceived by the caller, but not others?
...unction and outside it refer to the same value, both see the modification. By contrast, the n inside the function and outside it refer to different values after n was reassigned inside the function.
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How do I remove the Devise route to sign up?
...'m using Devise in a Rails 3 app, but in this case, a user must be created by an existing user, who determines what permissions he/she will have.
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What is the difference between gsub and sub methods for Ruby Strings
...u that it is not obvious! Java calls these replace and replaceAll. But Ruby has its roots in Perl which uses the g modifier. It's just one of those things.
– Ray Toal
Jul 21 '11 at 0:27
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Difference between scaling horizontally and vertically for databases [closed]
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Horizontal scaling means that you scale by adding more machines into your pool of resources whereas Vertical scaling means that you scale by adding more power (CPU, RAM) to an existing machine.
An easy way to remember this is to think of a machine on a server rack,...
psycopg2: insert multiple rows with one query
...s the following error: [TypeError: sequence item 0: expected str instance, bytes found] run this command instead [args_str = ','.join(cur.mogrify("(%s,%s)", x).decode("utf-8") for x in tup)]
– mrt
Sep 3 '18 at 23:08
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Maven is not working in Java 8 when Javadoc tags are incomplete
...n a way that is easily linked back to the
source code.
This is enabled by default, and will run a whole lot of checks before generating Javadocs. You need to turn this off for Java 8 as specified in this thread. You'll have to add this to your maven configuration:
<profiles>
<profile...
CSV in Python adding an extra carriage return, on Windows
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Python 3:
As described by YiboYang, set newline=''
with open('output.csv', 'w', newline='') as f:
writer = csv.writer(f)
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As noted in the comments by CoDEmanX, set newline='\n'
with open('output.csv', 'w', newline='\n', encoding='...
How to get child element by class name?
...hen filter the one whose className equals 4:
var doc = document.getElementById("test");
var notes = null;
for (var i = 0; i < doc.childNodes.length; i++) {
if (doc.childNodes[i].className == "4") {
notes = doc.childNodes[i];
break;
}
}
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When do we need to set ProcessStartInfo.UseShellExecute to True?
...tandardOutput=true, it seems to me you can still redirect standard output by doing process.Arguments= "cmd /c dir >c:\\crp\\a.a". Likewise from a run dialog box you can do cmd /c dir>c:\crp\a.a
– barlop
Apr 24 '16 at 22:51
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Transferring ownership of an iPhone app on the app store
...plete this process? I'm having issues with apps still needing to be signed by previous devs.
– Music Monkey
Oct 24 '13 at 13:11
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