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Single script to run in both Windows batch and Linux Bash?
...that any use of $? must be before your next colon : because : resets $? to 0.
:; echo "Hi, I’m ${SHELL}."; exit $?
@ECHO OFF
ECHO I'm %COMSPEC%
A very contrived example of guarding $?:
:; false; ret=$?
:; [ ${ret} = 0 ] || { echo "Program failed with code ${ret}." >&2; exit 1; }
:; exit...
filter for complete cases in data.frame using dplyr (case-wise deletion)
... answer!
– infominer
Mar 12 '14 at 20:09
1
Thanks! I added some benchmark results. na.omit() perf...
Computed / calculated / virtual / derived columns in PostgreSQL
...
140
Up to Postgres 11 generated columns are not supported - as defined in the SQL standard and imple...
How to install a private NPM module without my own registry?
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edited Apr 30 '12 at 21:47
answered Apr 30 '12 at 18:44
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Adding a UILabel to a UIToolbar
...cer release];
self.titleLabel = [[UILabel alloc] initWithFrame:CGRectMake(0.0 , 11.0f, self.view.frame.size.width, 21.0f)];
[self.titleLabel setFont:[UIFont fontWithName:@"Helvetica-Bold" size:18]];
[self.titleLabel setBackgroundColor:[UIColor clearColor]];
[self.titleLabel setTextColor:[UIColor co...
RestSharp simple complete example [closed]
...ents RestSharp. Hopefully of some help to you.
http://dkdevelopment.net/2010/05/18/dropbox-api-and-restsharp-for-a-c-developer/
The blog post is a 2 parter, and the project is here:
https://github.com/dkarzon/DropNet
It might help if you had a full example of what wasn't working. It's difficult ...
How to count number of files in each directory?
...et it find the directories and let bash do the rest:
find . -type d -print0 | while read -d '' -r dir; do
files=("$dir"/*)
printf "%5d files in directory %s\n" "${#files[@]}" "$dir"
done
share
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What is the worst real-world macros/pre-processor abuse you've ever come across?
...
70 Answers
70
Active
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method of iterating over sqlalchemy model's defined columns?
...: Please see functions such as Mapper.c and Mapper.mapped_table. If using 0.8 and higher also see Mapper.attrs and related functions.
Example for Mapper.attrs:
from sqlalchemy import inspect
mapper = inspect(JobStatus)
for column in mapper.attrs:
print column.key
...
How do I log a Python error with debug information?
... trace alongside the error message.
For example:
import logging
try:
1/0
except ZeroDivisionError:
logging.exception("message")
Output:
ERROR:root:message
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
ZeroDivisionError: integer division or modulo by ze...