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Initializing a list to a known number of elements in Python [duplicate]
...x in xrange(N)]
10 loops, best of 3: 109 ms per loop
>>> def fill_list1():
"""Not too bad, but complicated code"""
a = [None] * N
for x in xrange(N):
a[x] = x**2
>>> %timeit fill_list1()
10 loops, best of 3: 126 ms per loop
>>> def fill_list2():
"...
Cannot run Eclipse; JVM terminated. Exit code=13
...Files\Java\jre6\bin\javaw.exe -startup plugins/org.eclipse.equinox.launcher_1.1.0.v20100507.jar --launcher.library plugins/org.eclipse.equinox.launcher.win32.win32.x86_1.1.1.R36x_v20100810 -showsplash org.eclipse.platform --launcher.XXMaxPermSize 256m --launcher.defaultAction openFile -vmargs -Xms40...
How can I see the raw SQL queries Django is running?
...he specified, builtin Pythonian str() function, which invokes the internal __str__() method. e.g. str(MyModel.objects.filter(name="my name").query) I would also recommend using IPython and the Django shell of your project. Tab completion then provides object introspection. As Django is known for it...
How to start a background process in Python?
...e way your shell script did, or you can spawn it:
import os
os.spawnl(os.P_DETACH, 'some_long_running_command')
(or, alternatively, you may try the less portable os.P_NOWAIT flag).
See the documentation here.
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...
Android Notification Sound
... code:
Uri alarmSound = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
builder.setSound(alarmSound);
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Uncaught SyntaxError: Unexpected token :
...
To add to @andy_magoon, in my case, I had a script tag that was supposed to serve up javascript, but because the request was redirected to an HTML page (its not important why it was redirected), which begins with <!DOCTYPE html>, whic...
How to migrate back from initial migration in Django 1.7?
...ocs.djangoproject.com/en/1.7/ref/django-admin/…
– n__o
Jul 31 '15 at 5:50
@n__o Thanks. Updated answer.
...
How do I print the type of a variable in Rust?
...p.
For example, set the variable to a type which doesn't work:
let mut my_number: () = 32.90;
// let () = x; would work too
error[E0308]: mismatched types
--> src/main.rs:2:29
|
2 | let mut my_number: () = 32.90;
| ^^^^^ expected (), found floating-point n...
How to validate an Email in PHP?
...
You can use the filter_var() function, which gives you a lot of handy validation and sanitization options.
filter_var($email, FILTER_VALIDATE_EMAIL)
PHP Manual filter_var()
Available in PHP >= 5.2.0
If you don't want to change your code t...
Do you need text/javascript specified in your tags?
...he same kind of short-sighted thinking that makes people name their files "_new" and confuses other people for years. Is it the "_new"? Or "_new_new"? Or "_newer"? IMO it's short-sighted.
– Slobaum
Apr 11 '13 at 1:51
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