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Evaluating a mathematical expression in a string
...= 'Paul McGuire'
__version__ = '$Revision: 0.0 $'
__date__ = '$Date: 2009-03-20 $'
__source__ = '''http://pyparsing.wikispaces.com/file/view/fourFn.py
http://pyparsing.wikispaces.com/message/view/home/15549426
'''
__note__ = '''
All I've done is rewrap Paul McGuire's fourFn.py as a class, so I can u...
How can I rename a database column in a Ruby on Rails migration?
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2331
rename_column :table, :old_column, :new_column
You'll probably want to create a separate mig...
Xcode doesn't show the line that causes a crash
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301
You should also ensure that you have breakpoints set for all exceptions. This will cause Xcod...
How do I show the changes which have been staged?
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edited Feb 28 '18 at 23:35
Robert Harvey
164k4141 gold badges308308 silver badges467467 bronze badges
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Retrieving parameters from a URL
...lparse.urlparse(url)
print urlparse.parse_qs(parsed.query)['def']
Python 3:
import urllib.parse as urlparse
from urllib.parse import parse_qs
url = 'http://foo.appspot.com/abc?def=ghi'
parsed = urlparse.urlparse(url)
print(parse_qs(parsed.query)['def'])
parse_qs returns a list of values, so the...
How does the const constructor actually work?
...s with different canonicalized values (because signatures differ):
var foo3 = const Foo(1, 2); // $Foo$int$1$int$2
var foo4 = const Foo(1, 3); // $Foo$int$1$int$3
var baz1 = const Baz(const Foo(1, 1), "hello"); // $Baz$Foo$int$1$int$1$String$hello
var baz2 = const Baz(const Foo(1, 1), "hello"); //...
Getting and removing the first character of a string
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edited Oct 3 '16 at 6:28
answered Oct 11 '11 at 9:08
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Reorder bars in geom_bar ggplot2
...:
Used data:
corr.m <- structure(list(miRNA = structure(c(5L, 2L, 3L, 6L, 1L, 4L), .Label = c("mmu-miR-139-5p", "mmu-miR-1983", "mmu-miR-301a-3p", "mmu-miR-5097", "mmu-miR-532-3p", "mmu-miR-96-5p"), class = "factor"),
variable = structure(c(1L, 1L, 1L, 1L, 1L, 1L), ...
Automatic creation date for Django model form objects?
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319
You can use the auto_now and auto_now_add options for updated_at and created_at respectively.
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