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How to make good reproducible pandas examples
...owscitation needed, and I bet I can do it in 5 rows. Can you reproduce the error with df = df.head(), if not fiddle around to see if you can make up a small DataFrame which exhibits the issue you are facing.
* Every rule has an exception, the obvious one is for performance issues (in which case de...
Retrieve column names from java.sql.ResultSet
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Tried it on a teradata database and got the error "[Teradata Database] [TeraJDBC 16.20.00.02] [Error 9719] [SQLState HY000] QVCI feature is disabled."
– josepainumkal
Oct 10 '19 at 18:29
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linux: kill background task
... job. If a prefix matches more than one job, bash
reports an error. Using %?ce, on the other hand, refers to any job containing the string ce in its command line. If the
substring matches more than one job, bash reports an error. The symbols %% and %+ refer to the shell's n...
Passing an array by reference
...0 integers. You can safely use sizeof on x
void foo(int & x[100]); // error
This is parsed as an "array of references" - which isn't legal.
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ssh: Could not resolve hostname [hostname]: nodename nor servname provided, or not known
...ue why. When I try to ssh into my server with user@hostname , I get the error:
14 Answers
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How to throw a C++ exception
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Just add throw where needed, and try block to the caller that handles the error. By convention you should only throw things that derive from std::exception, so include <stdexcept> first.
int compare(int a, int b) {
if (a < 0 || b < 0) {
throw std::invalid_argument("a or b n...
addEventListener vs onclick
...onevent property back to its initial state (i.e. null).
Doesn't respond to errors appropriately. For example, if you by mistake assign a string to window.onload, for example: window.onload = "test";, it won't throw any errors. Your code wouldn't work and it would be really hard to find out why. .add...
Read .mat files in Python
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Encountered: mat4py.loadmat.ParseError: Can only read from Matlab level 5 MAT-files
– s2t2
Jul 19 '19 at 14:19
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The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
...you've deleted some old customers, but not their orders, you will get this error if you decide to make a foreign key from Orders.CustomerId to Customers.Id. Some orders don't have a corresponding customer any more, so it is impossible to add the foreign key.
– Chad Hedgcock
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Installing specific package versions with pip
...r to this question - thanks for your help. Hitting a different issue now: "error: command '/usr/bin/gcc-4.2' failed with exit status 1" while building '_mysql' extension. I know that I have GCC, and the install for MySQL_python 1.2.3 goes smoothly. Have others seen this issue, specifically with 1.2....