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Can a program depend on a library during compilation but not runtime?
...ed artifact, and you can also configure it to exclude certain dependencies from the WAR file using the provided scope.
The most common scope — Compile Scope — indicates that the dependency is available to your project on the compile classpath, the unit test compile and execution classpaths, and...
Remove blank lines with grep
I tried grep -v '^$' in Linux and that didn't work. This file came from a Windows file system.
14 Answers
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How to send SMS in Java
What are the possible ways to send and receive sms from Java application?
16 Answers
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List comprehension: Returning two (or more) items for each item
...
>>> from itertools import chain
>>> f = lambda x: x + 2
>>> g = lambda x: x ** 2
>>> list(chain.from_iterable((f(x), g(x)) for x in range(3)))
[2, 0, 3, 1, 4, 4]
Timings:
from timeit import timeit
f...
When to use margin vs padding in CSS [closed]
...lements while padding is on the inside.
Use margin to separate the block from things outside it
Use padding to move the contents away from the edges of the block.
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In Python how should I test if a variable is None, True or False
..."result pass"
else:
print "result fail"
# execution continues from here, regardless of exception or not
And now you can have a much richer type of notification from the simulate method as to what exactly went wrong, in case you find error/no-error not to be informative enough.
...
Converting a list to a set changes element order
...sertion order, you can use the keys of a Python dictionary, which starting from Python 3.7 is guaranteed to preserve the insertion order:
>>> a = dict.fromkeys([1, 2, 20, 6, 210])
>>> b = dict.fromkeys([6, 20, 1])
>>> dict.fromkeys(x for x in a if x not in b)
{2: None, 21...
Convert blob URL to normal URL
...
A URL that was created from a JavaScript Blob can not be converted to a "normal" URL.
A blob: URL does not refer to data the exists on the server, it refers to data that your browser currently has in memory, for the current page. It will not be av...
Large, persistent DataFrame in pandas
...., to an SQLite database step by step:
import pandas as pd
import sqlite3
from pandas.io import sql
import subprocess
# In and output file paths
in_csv = '../data/my_large.csv'
out_sqlite = '../data/my.sqlite'
table_name = 'my_table' # name for the SQLite database table
chunksize = 100000 # numbe...
ANTLR: Is there a simple example?
...r)
After creating the grammar, you'll want to generate a parser and lexer from it. Download the ANTLR jar and store it in the same directory as your grammar file.
Execute the following command on your shell/command prompt:
java -cp antlr-3.2.jar org.antlr.Tool Exp.g
It should not produce any er...