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What's the difference between size_t and int in C++?
...o assume size_t is the same as unsigned int, which can lead to programming errors, particularly as 64-bit architectures become more prevalent.
Also, check Why size_t matters
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How to update SQLAlchemy row entry?
...db.session.commit()
#db.session.close()
except:
print('Error in def update_state')
Why use db.session.flush()? That's why >>> SQLAlchemy: What's the difference between flush() and commit()?
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Array.Copy vs Buffer.BlockCopy
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Completely agree. There's too much room for error with Buffer.BlockCopy. Keep it simple, and don't try to squeeze any juice out of your program until you know where the juice is (profiling).
– Stephen
Sep 7 '09 at 19:36
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Create a nonclustered non-unique index within the CREATE TABLE statement with SQL Server
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I got Error: (1146) Table 'tablename' doesn't exist, hahahah, ironic
– Aminah Nuraini
Nov 3 '16 at 14:23
a...
Using do block vs braces {}
...s of code:
1.upto 3 do |x|
puts x
end
1.upto 3 { |x| puts x }
# SyntaxError: compile error
Second example only works when parentheses is used, 1.upto(3) { |x| puts x }
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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
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There is another case: ${var:?}, which will provide error when variable is unset or not set. REF: github.com/koalaman/shellcheck/wiki/SC2154
– Nam Nguyen
Apr 7 '15 at 4:32
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How do I analyze a program's core dump file with GDB when it has command-line parameters?
...t the way to use the core file. This could also be the reason you got that error. You can use the core file in the following ways:
gdb <executable> <core-file> or gdb <executable> -c <core-file> or
gdb <executable>
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(gdb) core <core-file>
When using the cor...
In git, is there a way to show untracked stashed files without applying the stash?
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Note that you get an ugly error (fatal: ambiguous argument 'stash@{0}^3': unknown revision or path not in the working tree.) if you don't actually have untracked files in that stash (but thought you did).
– Randall
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What's the difference between IEquatable and just overriding Object.Equals()?
...bj is not of type EntityBase, it will pass "null" and continue without any error or exception, But in case of "(EntityBase)obj", it will forcefully try to cast the obj to EntityBase and if the obj is not of type EntityBase, it will throw InvalidCastException. And yes, "as" can only be applied to ref...
Entity Framework DateTime and UTC
...hnson without @Saustrup's using statements, you get some unhelpful compile errors such as 'System.Array' does not contain a definition for 'Where'
– Jacob Eggers
May 30 '14 at 19:24
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