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How do I remove lines between ListViews on Android?
...etDividerHeight(0);
developer.android.com # ListView
Or, if you want to do it in XML:
android:divider="@null"
android:dividerHeight="0dp"
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How to implement the --verbose or -v option into a script?
... rather than putting the if in the function, which you might be tempted to do, do it like this:
if verbose:
def verboseprint(*args):
# Print each argument separately so caller doesn't need to
# stuff everything to be printed into a single string
for arg in args:
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Truncating all tables in a Postgres database
...ete all the data from my PostgreSQL database before a rebuild. How would I do this directly in SQL?
11 Answers
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How to make a variadic macro (variable number of arguments)
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I don't think C99 requires the ## before VA_ARGS. That might just be VC++.
– Chris Lutz
Mar 25 '09 at 2:18
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How do I pass a class as a parameter in Java?
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and how do i fire default constructor or some methods in that class ?
– user562350
Feb 2 '11 at 10:04
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How do you make a deep copy of an object?
...sures everything is a brand new reference.
Here's an article about how to do this efficiently.
Caveats: It's possible for classes to override serialization such that new instances are not created, e.g. for singletons. Also this of course doesn't work if your classes aren't Serializable.
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Can I export a variable to the environment from a bash script without sourcing it?
...can be quite useful, though it's inconvenient for interactive use since it doesn't give you the settings in your current shell (with all the other settings and history you've built up).
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How do I efficiently iterate over each entry in a Java Map?
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If you do that, then it won't work as Entry is a nested Class in Map. java.sun.com/javase/6/docs/api/java/util/Map.html
– ScArcher2
Mar 22 '10 at 13:30
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How to delete and replace last line in the terminal using bash?
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echo a carriage return with \r
seq 1 1000000 | while read i; do echo -en "\r$i"; done
from man echo:
-n do not output the trailing newline
-e enable interpretation of backslash escapes
\r carriage return
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How do you usually Tag log entries? (android)
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As mentioned by Ralph Mueller, this technique does not work if you use Proguard (as most Android projects do) to obfuscate the class names.
– John Patterson
Apr 28 '14 at 22:55
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