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Why are these constructs using pre and post-increment undefined behavior?
...ne the value to be stored.
and 6.5.16 Assignment operators, §4:
The order of evaluation of the operands is unspecified. If an attempt is made to modify
the result of an assignment operator or to access it after the next sequence point, the
behavior is undefined.
...
'IF' in 'SELECT' statement - choose output value based on column values
...HEN 'South America'
ELSE 'Europe' END AS Continent
FROM Suppliers
ORDER BY CompanyName;
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Does Python support short-circuiting?
...cuiting. As shown in the docs; they evaluate each element of a sequence in-order, until finding a result that allows an early exit in the evaluation. Consider examples below to understand both.
The function any() checks if any element is True. It stops executing as soon as a True is encountered an...
How to write header row with csv.DictWriter?
... writeheader() method now available in 2.7 / 3.2:
from collections import OrderedDict
ordered_fieldnames = OrderedDict([('field1',None),('field2',None)])
with open(outfile,'wb') as fou:
dw = csv.DictWriter(fou, delimiter='\t', fieldnames=ordered_fieldnames)
dw.writeheader()
# continue o...
Php multiple delimiters in explode
...f preg_split('/(@|@!)/','A@B@!C') vs preg_split('/(@!|@)/','A@B@!C'). The order of the delimiters changes the results. John's solution performs just as well as long as you are careful about how you order your array of delimiters.
– billynoah
Dec 7 '18 at 5:32...
Is the LIKE operator case-sensitive with MSSQL Server?
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You have an option to define collation order at the time of defining your table. If you define a case-sensitive order, your LIKE operator will behave in a case-sensitive way; if you define a case-insensitive collation order, the LIKE operator will ignore character...
convert an enum to another type of enum
....IsDefined or catch ArgumentExceptions thrown by Enum.Parse. Note that the order of the parameters is more or less reversed from Enum.Parse.
– Sander
Jun 5 '18 at 16:07
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Implicit type conversion rules in C++ operators
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If you exclude the unsigned types, there is an ordered
hierarchy: signed char, short, int, long, long long, float,
double, long double. First, anything coming before int in the
above will be converted to int. Then, in a binary operation,
the lower ranked type will be co...
Are global variables bad? [closed]
...ms, but there are usually additional complex logic that you need to add in order to make sure these magical variables behave properly.
– user2167582
Feb 26 '18 at 3:31
3
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What is JSONP, and why was it created?
...ave to use script HTML tags, the ones you usually use to load js files, in order for js to get data from another domain. Sounds weird?
Thing is - turns out script tags can be used in a fashion similar to XMLHttpRequest! Check this out:
script = document.createElement('script');
script.type = 'text...