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Why would you use Expression rather than Func?
...ment and submits it to server (rather than executing the lambda).
Conceptually, Expression<Func<T>> is completely different from Func<T>. Func<T> denotes a delegate which is pretty much a pointer to a method and Expression<Func<T>> denotes a tree data structure f...
How can I see all the issues I'm watching on Github?
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You can see all the Github issues you are currently subscribed to at https://github.com/notifications/subscriptions
You can navigate to this page from any page by clicking the notification/bell icon on the top left and then selecting "Ma...
How can I find all matches to a regular expression in Python?
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Use re.findall or re.finditer instead.
re.findall(pattern, string) returns a list of matching strings.
re.finditer(pattern, string) returns an iterator over MatchObject objects.
Example:
re.findall( r'all (.*?) are', 'all cats are s...
How can I get the list of a columns in a table for a SQLite database?
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What you're looking for is called the data dictionary. In sqlite a list of all tables can be found by querying sqlite_master table (or view?)
sqlite> create table people (first_name varchar, last_name varchar, email_address varchar);
sqlite> sel...
How to create a memory leak in Java?
...a thread pool to leak even faster).
The thread loads a class via an (optionally custom) ClassLoader.
The class allocates a large chunk of memory (e.g. new byte[1000000]), stores a strong reference to it in a static field, and then stores a reference to itself in a ThreadLocal. Allocating the extra ...
What's the difference between “Solutions Architect” and “Applications Architect”? [closed]
...g" term for Applications Architect . Is that correct or are the roles actually different somehow? If so, how?
11 Answers
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Failed to enable constraints. One or more rows contain values violating non-null, unique, or foreign
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This problem is usually caused by one of the following
null values being returned for columns not set to AllowDBNull
duplicate rows being returned with the same primary key.
a mismatch in column definition (e.g. size of char fields) between t...
argparse: identify which subparser was used [duplicate]
... method on the sub parser to solve this problem.
For example, I've added calls to set_defaults() to your code:
import argparse
parser = argparse.ArgumentParser( version='pyargparsetest 1.0' )
subparsers = parser.add_subparsers(help='commands')
# all
all_parser = subparsers.add_parser('all', help...
Count all occurrences of a string in lots of files with grep
...a bunch of log files. I need to find out how many times a string occurs in all files.
15 Answers
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Make Vim show ALL white spaces as a character
I can't find a way to make Vim show all white spaces as a character.
All I found was about tabs, trailing spaces etc.
23 An...