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Delete all tags from a Git repository
...he POSIX-compliant ‘-L’ option. gnu.org/software/findutils/manual/html_node/find_html/…
– Richard A Quadling
Jul 23 '19 at 12:13
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List of tables, db schema, dump etc using the Python sqlite3 API
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You can fetch the list of tables and schemata by querying the SQLITE_MASTER table:
sqlite> .tab
job snmptarget t1 t2 t3
sqlite> select name from sqlite_master where type = 'table';
job
t1
t2
snmptarget
t3
sqlite> .schema job
CREATE TABLE job (
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MySQL Cannot drop index needed in a foreign key constraint
... a SO Question on the topic).
ALTER TABLE mytable DROP FOREIGN KEY mytable_ibfk_1 ;
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How to execute a raw update sql with dynamic binding in rails
...using it's methods, e.g. for MySQL:
st = ActiveRecord::Base.connection.raw_connection.prepare("update table set f1=? where f2=? and f3=?")
st.execute(f1, f2, f3)
st.close
I'm not sure if there are other ramifications to doing this (connections left open, etc). I would trace the Rails code for a n...
Is it possible to rotate a drawable in the xml description?
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android:pivotY="50%"
android:drawable="@drawable/mainmenu_background">
</rotate>
The fromDegrees is important.
Basically this is a rotate animation defined in XML. With fromDegrees you define the initial rotated state. The toDegrees is the final rotated state of the dra...
Difference between fold and reduce?
...old left or right visually depicted in this wiki(en.wikipedia.org/wiki/Fold_%28higher-order_function). With an identity construct, the other two 'fundamental' FP operators (filter and fmap) are also implementable with an existing `fold' first-class language construct (they're all isomorphic construc...
@UniqueConstraint annotation in Java
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@Entity
@Table(uniqueConstraints={@UniqueConstraint(columnNames = {"id_1" , "id_2"})})
public class class_name {
@Id
@GeneratedValue
public Long id;
@NotNull
public Long id_1;
@NotNull
public Long id_2;
}
Hope it helped.
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Add a new item to a dictionary in Python [duplicate]
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default_data['item3'] = 3
Easy as py.
Another possible solution:
default_data.update({'item3': 3})
which is nice if you want to insert multiple items at once.
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NSInvocation for Dummies?
...y Ryan's note, index 0 is reserved for "self" and index 1 is reserved for "_cmd" (see the link e.James posted for more detail). So your first argument gets placed at index 2, second argument at index 3, etc...
– Dave
Jul 11 '10 at 20:47
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Upload artifacts to Nexus, without Maven
...ven command-line to upload files?
mvn deploy:deploy-file \
-Durl=$REPO_URL \
-DrepositoryId=$REPO_ID \
-DgroupId=org.myorg \
-DartifactId=myproj \
-Dversion=1.2.3 \
-Dpackaging=zip \
-Dfile=myproj.zip
This will automatically generate the Maven POM for the artifact.
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