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Create a File object in memory from a string in Java
...ethod accepts a file, there's another method nearby that accepts a stream. If this isn't the case, the API is badly coded. Otherwise, you can use temporary files, where permission is usually granted in many cases. If it's applet, you can request write permission.
An example:
try {
// Create te...
How do I check the operating system in Python?
...
You can use sys.platform:
from sys import platform
if platform == "linux" or platform == "linux2":
# linux
elif platform == "darwin":
# OS X
elif platform == "win32":
# Windows...
sys.platform has finer granularity than sys.name.
For the valid values, consult t...
How would you count occurrences of a string (actually a char) within a string?
...
If you're using .NET 3.5 you can do this in a one-liner with LINQ:
int count = source.Count(f => f == '/');
If you don't want to use LINQ you can do it with:
int count = source.Split('/').Length - 1;
You might be s...
Syntax highlighting/colorizing cat
...ith syntax highlighting is simply out of scope. cat is not meant for that.
If you just want to have the entire content of some file coloured in some way (with the same colour for the whole file), you can make use of terminal escape sequences to control the color.
Here's a sample script that will ch...
Why is the use of alloca() not considered good practice?
...ry. Freeing of memory allocated through malloc() is a major headache and if somehow missed leads to all sorts of memory problems.
...
Performing regex Queries with pymongo
...
If you want to include regular expression options (such as ignore case), try this:
import re
regx = re.compile("^foo", re.IGNORECASE)
db.users.find_one({"files": regx})
...
What exactly does stringstream do?
...complicated but it is quite complex. You create stringstream object ss, modify its flags, put a number into it with operator<<, and extract it via str(). I guess that operator>> could be used.
Also in this example the string buffer is hidden and not used explicitly. But it would be too ...
Drop all tables whose names begin with a certain string
...
You may need to modify the query to include the owner if there's more than one in the database.
DECLARE @cmd varchar(4000)
DECLARE cmds CURSOR FOR
SELECT 'drop table [' + Table_Name + ']'
FROM INFORMATION_SCHEMA.TABLES
WHERE Table_Name LIKE 'p...
How do I assign an alias to a function name in C++?
...
There are different approaches:
With C++11 with non-template non-overloaded functions you can simply use:
const auto& new_fn_name = old_fn_name;
If this function has multiple overloads you should use static_cast:
const auto&...
How do I format a string using a dictionary in python-3.x?
...
Since the question is specific to Python 3, here's using the new f-string syntax, available since Python 3.6:
>>> geopoint = {'latitude':41.123,'longitude':71.091}
>>> print(f'{geopoint["latitude"]} {geopoint["longitude"]}')
41.123 ...