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How do I create a URL shortener?
...ou just do a reverse lookup in your alphabet.
e9a62 will be resolved to "4th, 61st, and 0th letter in the alphabet".
e9a62 = [4,61,0] = 4×622 + 61×621 + 0×620 = 1915810
Now find your database-record with WHERE id = 19158 and do the redirect.
Example implementations (provided by commenters)
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Creating an R dataframe row-by-row
...de in R.
If you can, allocate your entire data.frame up front:
N <- 1e4 # total number of rows to preallocate--possibly an overestimate
DF <- data.frame(num=rep(NA, N), txt=rep("", N), # as many cols as you need
stringsAsFactors=FALSE) # you don't know levels yet...
if A vs if A is not None:
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answered Oct 19 '11 at 4:09
Greg HewgillGreg Hewgill
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Eclipse compilation error: The hierarchy of the type 'Class name' is inconsistent
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edited May 12 '14 at 12:37
answered Dec 15 '11 at 12:32
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Importing a Maven project into Eclipse from Git
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Maarten Bodewes
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answered Sep 1 '11 at 11:56
Sri SankaranSr...
Python Image Library fails with message “decoder JPEG not available” - PIL
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489
libjpeg-dev is required to be able to process jpegs with pillow (or PIL), so you need to insta...
Access nested dictionary items via a list of keys?
...Dict, ["b", "v", "y"])
2
>>> setInDict(dataDict, ["b", "v", "w"], 4)
>>> import pprint
>>> pprint.pprint(dataDict)
{'a': {'r': 1, 's': 2, 't': 3},
'b': {'u': 1, 'v': {'w': 4, 'x': 1, 'y': 2, 'z': 3}, 'w': 3}}
Note that the Python PEP8 style guide prescribes snake_case na...
Recursively list all files in a directory including files in symlink directories
...1:59
wxs
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answered Sep 19 '08 at 20:23
Michael RidleyMi...
how to access iFrame parent page using jquery?
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496
To find in the parent of the iFrame use:
$('#parentPrice', window.parent.document).html();
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Modify table: How to change 'Allow Nulls' attribute from not null to allow null
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-- replace NVARCHAR(42) with the actual type of your column
ALTER TABLE your_table
ALTER COLUMN your_column NVARCHAR(42) NULL
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