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Drop all duplicate rows across multiple columns in Python Pandas
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What if my columns are not explicitly labelled? How do I select the columns just based on their index?
– Hamman Samuel
Feb 9 '17 at 21:42
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How to escape apostrophe (') in MySql?
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Here's an example:
SELECT * FROM pubs WHERE name LIKE "%John's%"
Just use double quotes to enclose the single quote.
If you insist in using single quotes (and the need to escape the character):
SELECT * FROM pubs WHERE name LIKE '%John\'s%'...
Logging levels - Logback - rule-of-thumb to assign log levels
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from logback documentation:
In a more graphic way, here is how the selection rule works. In the following table, the vertical header shows the level of the logging request, designated by p, while the horizontal header shows effective level of the logger, designated by q. The intersection of ...
Converting a List to a comma separated string
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List<int> list = ...;
string.Join(",", list.Select(n => n.ToString()).ToArray())
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Optional Parameters with C++ Macros
... You could get a clear compilation error if you converted the selected argument which is supposed to be a MACRO name to string using # (the pound sign) and compared it's first n characters with the expected prefix and if there is no match, printed an informative error.
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Merge branch with trunk
...der to merge branch into trunk.
1) Right click on trunk working copy and select the below option.
2) In case of Branch Merging into trunk select option second as shown below and click next
3) In the From: field enter the full folder URL of the trunk. This may sound wrong, but remember that...
Convert data.frame column to a vector?
... The reminder of drop=FALSE is useful - this helps me in cases where I may select N columns from a data.frame, in those cases where N=1.
– Iterator
Aug 15 '11 at 20:42
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How do I free my port 80 on localhost Windows?
...ative rights. open start, and write in search "cmd" right click on cmd and select Run as administrator.
– MuhFred
Dec 5 '14 at 19:30
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Manipulating an Access database from Java without ODBC
...db");
Statement s = conn.createStatement();
ResultSet rs = s.executeQuery("SELECT [LastName] FROM [Clients]");
while (rs.next()) {
System.out.println(rs.getString(1));
}
Disclosure
At the time of writing this Q&A I had no involvement in or affiliation with the UCanAccess project; I ju...
How to repeat last command in python interpreter shell?
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In IDLE, go to Options -> Configure IDLE -> Keys and there select history-next and then history-previous to change the keys.
Then click on Get New Keys for Selection and you are ready to choose whatever key combination you want.
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