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What is the dual table in Oracle?
...ystem function in a select statement:
e.g. select sysdate from dual;
See http://www.adp-gmbh.ch/ora/misc/dual.html
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How do you echo a 4-digit Unicode character in Bash?
...d like to add the Unicode skull and crossbones to my shell prompt (specifically the 'SKULL AND CROSSBONES' (U+2620)), but I can't figure out the magic incantation to make echo spit it, or any other, 4-digit Unicode character. Two-digit one's are easy. For example, echo -e "\x55", .
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“Content is not allowed in prolog” when parsing perfectly valid XML on GAE
...t, just delete all those weird characters before the “<?xml“.
Ref: http://www.mkyong.com/java/sax-error-content-is-not-allowed-in-prolog/
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Map enum in JPA with fixed values?
...T")
@Enumerated(EnumType.STRING)
private Right right;
Further details:
http://java.dzone.com/articles/mapping-enums-done-right
http://www.thoughts-on-java.org/jpa-21-how-to-implement-type-converter/
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Could not calculate build plan: Plugin org.apache.maven.plugins:maven-resources-plugin:2.5 or one of
...Failure to find org.apache.maven.plugins:maven-resources-plugin:pom:2.5 in http://repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced -> [Help 1]
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Had maven 3.0.5, eclipse K...
Django rest framework nested self-referential objects
... the `subcategories` field
return CategorySerializer()
Actually, as you've noted the above isn't quite right.
This is a bit of a hack, but you might try adding the field in after the serializer is already declared.
class CategorySerializer(serializers.ModelSerializer):
parentCat...
Getting the first character of a string with $str[0]
...am just not sure whether this is 'good practice', as that notation is generally used with arrays. This feature doesn't seem to be very well documented so I'm turning to you guys to tell me if it's all right – in all respects – to use this notation?
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Making a property deserialize but not serialize with json.net
...
There are actually several fairly simple approaches you can use to achieve the result you want.
Let's assume, for example, that you have your classes currently defined like this:
class Config
{
public Fizz ObsoleteSetting { get; set;...
Difference between TCP and UDP?
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The Law of Leaky Abstractions
by Joel Spolsky
http://www.joelonsoftware.com/articles/LeakyAbstractions.html
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Find and Replace text in the entire table using a MySQL query
...uotes to get it to work in phpMyAdmin. I used it to replace only the text "http:" with "https:" in a column containing full web addresses. The rest of the web addresses were untouched.
– Heres2u
Mar 20 '18 at 14:34
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