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mysql - how many columns is too many?
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It's considered too many once it's above the maximum limit supported by the database.
The fact that you don't need every column to be returned by every query is perfectly normal; that's why SELECT statement lets you explicitly name t...
What is the difference between .*? and .* regular expressions?
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It is the difference between greedy and non-greedy quantifiers.
Consider the input 101000000000100.
Using 1.*1, * is greedy - it will match all the way to the end, and then backtrack until it can match 1, leaving you with 1010000000001.
.*? is non-greedy. * will match nothing, but then will ...
What's the difference between “Write-Host”, “Write-Output”, or “[console]::WriteLine”?
...ost ("count=" + $count)
# or
write-host "count=$count"
BTW - Watch this video of Jeffrey Snover explaining how the pipeline works. Back when I started learning PowerShell I found this to be the most useful explanation of how the pipeline works.
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What characters are valid for JavaScript variable names?
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To quote Valid JavaScript variable names, my write-up summarizing the relevant spec sections:
An identifier must start with $, _, or any character in the Unicode categories “Uppercase letter (Lu)”, “Lowercase letter (Ll)”, ...
Maven: how to override the dependency added by a library
...cify the version in your current pom. The version specified here will override other.
Forcing a version
A version will always be honoured if it is declared in the current POM with a particular version - however, it should be noted that this will also affect other poms downstream if it is itsel...
Understanding the difference between __getattr__ and __getattribute__
...(instance, attribute_name) ?
– Md. Abu Nafee Ibna Zahid
Jun 20 '18 at 8:23
2
@Md.AbuNafeeIbnaZahi...
Setup RSpec to test a gem (not Rails)
...dded s.add_development_dependency "rspec", ">= 2.0.0" to gemspec and did a bundle install .
4 Answers
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How to get function parameter names/values dynamically?
... vikasde wants the parameter values in an array also. This is already provided in a local variable named arguments.
excerpt from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Functions_and_function_scope/arguments:
The arguments object is not an Array. It is similar to an Ar...
Does JavaScript have “Short-circuit” evaluation?
...ew so far:
First let's inspect the behaviour we are all familiar with, inside the if() block, where we use && to check whether the two things are true:
if (true && true) {
console.log('bar');
}
Now, your first instinct is probably to say: 'Ah yes, quite simple, the code execu...
Rich vs Anemic Domain Model [closed]
I am deciding if I should use a Rich Domain Model over an Anemic Domain Model, and looking for good examples of the two.
10...