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Check if a table exists in Rails
...ake task that won't work unless a table exists. I'm working with more than 20 engineers on a website so I want to make sure they have migrated the table before they can do a rake task which will populate that respective table.
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Pip freeze vs. pip list
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karthikrkarthikr
83.2k2020 gold badges170170 silver badges171171 bronze badges
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Get last n lines of a file, similar to tail
...e till it's found the right number of '\n' characters.
def tail( f, lines=20 ):
total_lines_wanted = lines
BLOCK_SIZE = 1024
f.seek(0, 2)
block_end_byte = f.tell()
lines_to_go = total_lines_wanted
block_number = -1
blocks = [] # blocks of size BLOCK_SIZE, in reverse ord...
How to enable MySQL Query Log?
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edited Nov 1 '18 at 21:20
Harry Moreno
7,04933 gold badges4343 silver badges8080 bronze badges
answer...
CSS last-child selector: select last-element of specific class, not last child inside of parent?
... " id="com21"></article>
<article class="comment " id="com20"></article>
<article class="comment " id="com19"></article>
<div class="something"> hello </div>
</div>
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How to determine the first and last iteration in a foreach loop?
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20 Answers
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Take a screenshot of a webpage with JavaScript?
...(not the whole page)?
– trusktr
Feb 20 '12 at 8:59
Yes you can. Either use this snippet with PhantomJS or use CasperJS...
How find all unused classes in Intellij Idea?
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Alireza Noorali
3,58511 gold badge2020 silver badges5757 bronze badges
answered Jul 7 '16 at 11:13
BlondCodeBlondCode
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Mongoimport of json file
I have a json file consisting of about 2000 records. Each record which will correspond to a document in the mongo database is formatted as follows:
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Can I browse other people's (Apple) bug reports? [closed]
... Pixel
– Graham Perrin
Apr 1 '13 at 20:02
9
Why do people share their radar numbers on here then ...