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String concatenation: concat() vs “+” operator
...ring cat(String a, String b) {
a += b;
return a;
}
}
Now disassemble with javap -c (included in the Sun JDK). You should see a listing including:
java.lang.String cat(java.lang.String, java.lang.String);
Code:
0: new #2; //class java/lang/StringBuilder
3: dup
...
Formatting Numbers by padding with leading zeros in SQL Server
... Still, I'd like to see this bubble a little closer to the top now.
– Dave Haynes
Dec 16 '14 at 15:34
4
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How do I add a foreign key to an existing SQLite table?
...you will have to recreate all this tables too.
– rocknow
Sep 18 '14 at 1:16
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Undefined reference to `pow' and `floor'
... an error, but pow, floor, and printf functions have undefined references, now if I will try to link this to executable:
$ gcc fib.o
fib.o: In function `fibo':
fib.c:(.text+0x57): undefined reference to `pow'
fib.c:(.text+0x84): undefined reference to `floor'
collect2: error: ld returned 1 exit sta...
How to create a private class method?
...method in a separate line. I personally don't like this usage but good to know that it exists.
private_class_method def self.method_name
....
end
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No visible cause for “Unexpected token ILLEGAL”
...space character (a.k.a. ZWSP, HTML entity ​). That character is known to cause the Unexpected token ILLEGAL JavaScript syntax error.
And where did it come from?
I can't tell for sure, but my bet is on jsfiddle. If you paste code from there, it's very likely to include one or more U+200B ch...
Make header and footer files to be included in multiple html pages
...l
<a href="http://www.google.com">click here for google</a>
Now, when you visit index.html, you should be able to click the link tags.
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How should I use git diff for long lines?
...
I can't remember for sure now. But found some links that explain it more: michael.otacoo.com/linux-2/avoid-escape-characters-in-git superuser.com/questions/366930/… unix.stackexchange.com/questions/19317/…
– Shoan
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Combining two Series into a DataFrame in pandas
...Column_name#1'] = series_1
df['Column_name#2'] = series_2
Check results now
df.head(5)
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undefined reference to boost::system::system_category() when compiling
...y's features).
Starting from Boost 1.66 and this commit, this behavior is now the default, so hopefully fewer and fewer users should need this answer.
As noticed by @AndrewMarshall, an alternative is to define BOOST_ERROR_CODE_HEADER_ONLY which enables a header-only version of the code. This was d...