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IN vs OR in the SQL WHERE Clause
...xed I got these results:
SELECT COUNT(*) FROM t_inner WHERE val IN (1000, 2000, 3000, 4000, 5000, 6000, 7000, 8000, 9000);
1 row fetched in 0.0032 (1.2679 seconds)
SELECT COUNT(*) FROM t_inner WHERE val = 1000 OR val = 2000 OR val = 3000 OR val = 4000 OR val = 5000 OR val = 6000 OR val = 7000 OR v...
Find and replace in file and overwrite file doesn't work, it empties the file
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923
When the shell sees > index.html in the command line it opens the file index.html for writi...
Junit: splitting integration test and Unit tests
...lt;artifactId>maven-surefire-plugin</artifactId>
<version>2.11</version>
<dependencies>
<dependency>
<groupId>org.apache.maven.surefire</groupId>
<artifactId>surefire-junit47</artifactId>
<version>2.12</version&g...
How to count the number of occurrences of an element in a List
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22 Answers
22
Active
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Decode HTML entities in Python string?
... 3.4+
Use html.unescape():
import html
print(html.unescape('&pound;682m'))
FYI html.parser.HTMLParser.unescape is deprecated, and was supposed to be removed in 3.5, although it was left in by mistake. It will be removed from the language soon.
Python 2.6-3.3
You can use HTMLParser.unesca...
Rails check if yield :area is defined in content_for
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217
@content_for_whatever is deprecated.
Use content_for? instead, like this:
<% if content_fo...
Why are there two build.gradle files in an Android Studio project?
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2 Answers
2
Active
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@UniqueConstraint annotation in Java
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427
To ensure a field value is unique you can write
@Column(unique=true)
String username;
The @U...
Why are C# 3.0 object initializer constructor parentheses optional?
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This question was the subject of my blog on September 20th 2010. Josh and Chad's answers ("they add no value so why require them?" and "to eliminate redundancy") are basically correct. To flesh that out a bit more:
The feature of allowing you to elide the argument list as part ...
What is cardinality in MySQL?
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122
Max cardinality: All values are unique
Min cardinality: All values are the same
Some columns ...