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How to add column if not exists on PostgreSQL?
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Matthew WoodMatthew Wood
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Label encoding across multiple columns in scikit-learn
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462
+50
You can...
Setting environment variables on OS X
...cations/Dev/apache-ant
setenv ANT_OPTS -Xmx512M
setenv MAVEN_OPTS "-Xmx1024M -XX:MaxPermSize=512m"
setenv M2_HOME /Applications/Dev/apache-maven
setenv JMETER_HOME /Applications/Dev/jakarta-jmeter
Save your changes in vi and reboot your Mac. Or use the grep/xargs command which is shown in the cod...
How to call a shell script from python code?
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264
The subprocess module will help you out.
Blatantly trivial example:
>>> import subproce...
browser sessionStorage. share between tabs?
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answered Sep 24 '15 at 16:47
nawlbergsnawlbergs
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Insert into a MySQL table or update if exists
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1664
Use INSERT ... ON DUPLICATE KEY UPDATE
QUERY:
INSERT INTO table (id, name, age) VALUES(1, "A",...
Print multiple arguments in Python
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edited Jun 1 '18 at 4:17
answered Mar 8 '13 at 3:52
B...
What is an efficient way to implement a singleton pattern in Java? [closed]
... Stephen DenneStephen Denne
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205
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Catch multiple exceptions at once?
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Joe
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answered Sep 25 '08 at 21:01
Joseph DaigleJoseph ...