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Class constants in python
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146
Since Horse is a subclass of Animal, you can just change
print(Animal.SIZES[1])
with
print...
Django - Difference between import django.conf.settings and import settings
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How does one output bold text in Bash?
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edited Apr 29 '15 at 9:54
gsamaras
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What does new self(); mean in PHP?
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214
self points to the class in which it is written.
So, if your getInstance method is in a class ...
Incomplete type is not allowed: stringstream
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#include <sstream> and use the fully qualified name i.e. std::stringstream ss;
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PowerShell and the -contains operator
...lse #Not an exact match
I think what you want is the -Match operator:
"12-18" -Match "-"
Which returns True.
Important: As pointed out in the comments and in the linked documentation, it should be noted that the -Match operator uses regular expressions to perform text matching.
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grep output to show only matching file
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edited Mar 12 '13 at 22:54
Vincent Scheib
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In Postgresql, force unique on combination of two columns
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CREATE TABLE someTable (
id serial primary key,
col1 int NOT NULL,
col2 int NOT NULL,
unique (col1, col2)
)
autoincrement is not postgresql. You want a serial.
If col1 and col2 make a unique and can't be null then they make a good primary key:
CREATE TABLE someTab...
How can I find all matches to a regular expression in Python?
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