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Troubleshooting “Illegal mix of collations” error in mysql
... two strings of incompatible collation or by attempting to select data of different collation into a combined column.
The clause COLLATE allows you to specify the collation used in the query.
For example, the following WHERE clause will always give the error you posted:
WHERE 'A' COLLATE latin1_g...
How to change height of grouped UITableView header?
...auses UITableView to use a default value. This is
undocumented behavior. If you return a very small number, you
effectively get a zero-height header.
Swift 3:
func tableView(_ tableView: UITableView, heightForHeaderInSection section: Int) -> CGFloat {
if section == 0 {
...
What are allowed characters in cookies?
...supported by browsers:
either the NAME or the VALUE may be empty strings
if there is no = symbol in the string at all, browsers treat it as the cookie with the empty-string name, ie Set-Cookie: foo is the same as Set-Cookie: =foo.
when browsers output a cookie with an empty name, they omit the equ...
Application auto build versioning
... Note that before Go 1.5 this option took two separate arguments.
Now it takes one argument split on the first = sign.
As part of your build process, you could set a version string variable using this. You can pass this through the go tool using -ldflags. For example, given the following s...
Get and Set a Single Cookie with Node.js HTTP Server
... with the suggestion of using Express's cookie parser. But, that answer is now 3 years old and is out of date.
Using Express, you can read a cookie as follows
var express = require('express');
var cookieParser = require('cookie-parser');
var app = express();
app.use(cookieParser());
app.get('/my...
How do I save and restore multiple variables in python?
...
If you need to save multiple objects, you can simply put them in a single list, or tuple, for instance:
import pickle
# obj0, obj1, obj2 are created here...
# Saving the objects:
with open('objs.pkl', 'w') as f: # Python ...
Function for Factorial in Python
...l (available in Python 2.6 and above):
import math
math.factorial(1000)
If you want/have to write it yourself, you can use an iterative approach:
def factorial(n):
fact = 1
for num in range(2, n + 1):
fact *= num
return fact
or a recursive approach:
def factorial(n):
i...
What does the regular expression /_/g mean?
...
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Paste multiple columns together
... note that instead of d[ , cols] you may want to use d[ , names(d) != 'a'] if all but the a column are to be pasted together.
– baptiste
Jan 28 '13 at 18:39
...
PyPy — How can it possibly beat CPython?
...omment under that post, you will see that the writer of that post doesn't know link-time optimization. With link-time optimization enabled, the C code runs faster.
– Ali
Jun 26 '14 at 9:33
...