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xpath find if node exists
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<xsl:if test="xpath-expression">...</xsl:if>
so for example
<xsl:if test="/html/body">body node exists</xsl:if>
<xsl:if test="not(/html/body)">body node missing</xsl:if>
s...
ReferenceError: event is not defined error in Firefox
I've made a page for a client and I initially was working in Chrome and forgot to check if it was working in Firefox. Now, I have a big problem because the whole page is based upon a script that doesn't work in Firefox.
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PHP namespaces and “use”
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The use operator is for giving aliases to names of classes, interfaces or other namespaces. Most use statements refer to a namespace or class that you'd like to shorten:
use My\Full\Namespace;
is equivalent to:
use My\Full\Namespace as Names...
How to check if a user is logged in (how to properly use user.is_authenticated)?
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Update for Django 1.10+:
is_authenticated is now an attribute in Django 1.10.
The method was removed in Django 2.0.
For Django 1.9 and older:
is_authenticated is a function. You should call it like
if request.user.is_authenticated()...
Shorthand way for assigning a single field in a record, while copying the rest of the fields?
...ildCards extension can be nice as well, to “unpack” fields in a scope. For updates it’s not quite as nice though: incrementA x@Foo{..} = x { a = succ a }
– Jon Purdy
Feb 19 '13 at 14:14
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Obtain Bundle Identifier programmatically
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This answer is not limited to iOS. It works for Mac apps too.
– Jonny
Oct 31 '13 at 1:40
9
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Adding a build configuration in Xcode
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For me it was working only when I pressed "Build Settings" tab. However, you can scroll "Build Settings" down to "User-Defined" section and add setting manually.
– Leo
Oct 28 '16 at 14:2...
Clicking the back button twice to exit an activity
...e quick solution/answer but I don't agree that it's the best solution. And for the ones who think this will be best answer again I can't agree. These solution causes leaks and will require extra effort for handling. Check the aswers below for further details.
– Saro Taşciyan
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linux tee is not working with python?
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From man python:
-u Force stdin, stdout and stderr to be totally unbuffered. On systems
where it matters, also put stdin, stdout and stderr in binary mode. Note
that there is internal buffering in xreadlines(), readlin...
Is == in PHP a case-sensitive string comparison?
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Yes, == is case sensitive.
You can use strcasecmp for case insensitive comparison
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