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Default constructor vs. inline field initialization
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25
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How to replace a character with a newline in Emacs?
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Use didSelectRowAtIndexPath or prepareForSegue method for UITableView?
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5
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How to count objects in PowerShell?
... in the PowerShell user guide, one of the core PowerShell concepts is that commands accept and return objects instead of text. So for example, running get-alias returns me a number of System.Management.Automation.AliasInfo objects:
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Java current machine name and logged in user?
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As for what OP refers to as "machine name" or "computer name" this answer is incorrect. Java has no way to obtain the "computer name", i.e. the name assigned to the computer early on in the boot process and unrelated to network. All OS'es have this concept, but unfortunat...
Mechanisms for tracking DB schema changes [closed]
... are applied and a "down" method in which the changes are undone. A single command brings the database up to date, and can also be used to bring the database to a specific version of the schema. In Rails, migrations are kept in their own directory in the project directory and get checked into versio...
binning data in python with scipy/numpy
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Signed to unsigned conversion in C - is it always safe?
... It will be large, but it will not overflow, because:
6.2.5 (9)
A computation involving unsigned operands can never overflow, because a result that cannot be represented by the resulting unsigned integer type is reduced modulo the number that is one greater than the largest value that can b...
C++ SFINAE examples?
... can't have a member pointer. If SFINAE didn't exist, then you would get a compiler error, something like '0 cannot be converted to member pointer for non-class type int'. Instead, it just uses the ... form which returns Two, and thus evaluates to false, int is not a class type.
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How to use Bash to create a folder if it doesn't already exist?
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First, in bash "[" is just a command, which expects string "]" as a last argument, so the whitespace before the closing bracket (as well as between "!" and "-d" which need to be two separate arguments too) is important:
if [ ! -d /home/mlzboy/b2c2/share...