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How to erase the file contents of text file in Python?
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In python:
open('file.txt', 'w').close()
Or alternatively, if you have already an opened file:
f = open('file.txt', 'r+')
f.truncate(0) # need '0' when using r+
In C++, you could use something similar.
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Which exception should I raise on bad/illegal argument combinations in Python?
...t is sometimes better to create your own exceptions, but inherit from a built-in one, which is as close to what you want as possible.
If you need to catch that specific error, it is helpful to have a name.
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Error: Could not find or load main class [duplicate]
...lo World!");
}
}
Then calling:
java -classpath . TheClassName
results in Error: Could not find or load main class TheClassName. This is because it must be called with its fully-qualified name:
java -classpath . thepackagename.TheClassName
And this thepackagename directory must exist in t...
Center Google Maps (V3) on browser resize (responsive)
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Agree with @William, this method results in a more accurate center-position when the map is resized.
– tenthfloor
Feb 2 '14 at 17:08
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How to implode array with key and value without foreach in PHP
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You could use http_build_query, like this:
<?php
$a=array("item1"=>"object1", "item2"=>"object2");
echo http_build_query($a,'',', ');
?>
Output:
item1=object1, item2=object2
Demo
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Which @NotNull Java annotation should I use?
...PARAMETER, LOCAL_VARIABLE})
public @interface NotNull {String value() default "";}
package javax.annotation;
@TypeQualifier
@Retention(RUNTIME)
public @interface Nonnull {
When when() default When.ALWAYS;
static class Checker implements TypeQualifierValidator<Nonnull> {
pub...
How to get Latitude and Longitude of the mobile device in android?
... application the ACCESS_FINE_LOCATION permission if you want to use GPS.
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
You may also want to add the ACCESS_COARSE_LOCATION permission for when GPS isn't available and select your location provider with the getBestP...
Ways to eliminate switch in code [closed]
... what doLogin() used to do
}
}
class RequestHandler {
private Map<Integer, Command> commandMap; // injected in, or obtained from a factory
public void handleRequest(int action) {
Command command = commandMap.get(action);
command.execute();
}
}
If your (pseudo...
PHP file_get_contents() and setting request headers
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suddenly curious: what is the default user agent of file_get_contents()? does it specify one?
– Raptor
Oct 16 '15 at 8:24
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Delete commits from a branch in Git
...of the commit you want to back up to, and then do this:
git reset --hard <sha1-commit-id>
If you already pushed it, you will need to do a force push to get rid of it...
git push origin HEAD --force
However, if others may have pulled it, then you would be better off starting a new branc...