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Why do == comparisons with Integer.valueOf(String) give different results for 127 and 128?
...g difference here.
valueOf is returning an Integer object, which may have its values cached between -128 and 127. This is why the first value returns true - it's cached - and the second value returns false - 128 isn't a cached value, so you're getting two separate Integer instances.
It is importa...
Setting the selected value on a Django forms.ChoiceField
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Try setting the initial value when you instantiate the form:
form = MyForm(initial={'max_number': '3'})
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How to remove unreferenced blobs from my git repo
I have a GitHub repo that had two branches - master & release.
10 Answers
10
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How to send an email using PHP?
I am using PHP on a website and I want to add emailing functionality.
14 Answers
14
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Does Swift support reflection?
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Looks like there's the start of some reflection support:
class Fruit {
var name="Apple"
}
reflect(Fruit()).count // 1
reflect(Fruit())[0].0 // "name"
reflect(Fruit())[0].1.summary // "Apple"
From mchambers gist, here:
https://gist.github.com/mchambers/fb9da554898dae...
Eclipse - Unable to install breakpoint due to missing line number attributes
...generated class file" was checked. I did a clean, recompile. I did uncheck it, recompile, check it, recompile. I made sure the project did use the global settings. Still the same message.
I switched to ant build, using
<javac srcdir="./src/java" destdir="./bin" debug="true">
Still, same me...
How to execute a bash command stored as a string with quotes and asterisk [duplicate]
...ou tried:
eval $cmd
For the follow-on question of how to escape * since it has special meaning when it's naked or in double quoted strings: use single quotes.
MYSQL='mysql AMORE -u username -ppassword -h localhost -e'
QUERY="SELECT "'*'" FROM amoreconfig" ;# <-- "double"'single'"double"
eval ...
Does anyone still use [goto] in C# and if so why? [closed]
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There are some (rare) cases where goto can actually improve readability. In fact, the documentation you linked to lists two examples:
A common use of goto is to transfer control to a specific switch-case label or the default label in a switch statement.
The goto statement is also useful to g...
Best way to create unique token in Rails?
...s what I'm using. The token doesn't necessarily have to be heard to guess, it's more like a short url identifier than anything else, and I want to keep it short. I've followed some examples I've found online and in the event of a collision, I think the code below will recreate the token, but I'm n...
Apply CSS styles to an element depending on its child elements
Is it possible to define a CSS style for an element, that is only applied if the matching element contains a specific element (as the direct child item)?
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