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Haskell error parse error on input `='
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160
In GHCi 7.x or below, you need a let to define things in it.
Prelude> let f x = x * 2
Prel...
Change text from “Submit” on input tag
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167
The value attribute on submit-type <input> elements controls the text displayed.
<in...
Django's SuspiciousOperation Invalid HTTP_HOST header
After upgrading to Django 1.5, I started getting errors like this:
4 Answers
4
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How to undo 'git reset'?
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Short answer:
git reset 'HEAD@{1}'
Long answer:
Git keeps a log of all ref updates (e.g., checkout, reset, commit, merge). You can view it by typing:
git reflog
Somewhere in this list is the commit that you lost. Let's say you just typed git reset HE...
How do you represent a JSON array of strings?
...hy":null} ]
{
"not true": [0, false],
"true": true,
"not null": [0, 1, false, true, {
"obj": null
}, "a string"]
}
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Why does a RegExp with global flag give wrong results?
...st remove the g flag.
Here's the algorithm that the specs dictate (section 15.10.6.2):
RegExp.prototype.exec(string)
Performs
a regular expression match of string
against the regular expression and
returns an Array object containing the
results of the match, or null if the
string did not match The ...
Get current batchfile directory
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511
System read-only variable %CD% keeps the path of the caller of the batch, not the batch file lo...
How do I select child elements of any depth using XPath?
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161
You're almost there. Simply use:
//form[@id='myform']//input[@type='submit']
The // shortcu...
Does .NET have a way to check if List a contains all items in List b?
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178
If you're using .NET 3.5, it's easy:
public class ListHelper<T>
{
public static boo...