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Check existence of input argument in a Bash shell script
...
It is:
if [ $# -eq 0 ]
then
echo "No arguments supplied"
fi
The $# variable will tell you the number of input arguments the script was passed.
Or you can check if an argument is an empty string or not like:
if [ -z "$1...
Adaptive segue in storyboard Xcode 6. Is push deprecated?
Xcode 6 interface builder by default has new checkbox "use size classes". It makes views adaptive.
7 Answers
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Can virtual functions have default parameters?
... class (or interface class) and specify a default value for one or more of its parameters, do the derived classes have to specify the same defaults and if not, which defaults will manifest in the derived classes?
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Error in Swift class: Property not initialized at super.init call
...mpiler performs four helpful safety-checks to make sure
that two-phase initialization is completed without error:”
Safety check 1 “A designated initializer must ensure that all of the
“properties introduced by its class are initialized before it
delegates up to a superclass initiali...
Do DOM tree elements with ids become global variables?
... apparent properties of the document object. This is a really bad idea, as it allows element names to clash with real properties of document.
IE made the situation worse by also adding named elements as properties of the window object. This is doubly bad in that now you have to avoid naming your el...
Is it safe to check floating point values for equality to 0?
I know you can't rely on equality between double or decimal type values normally, but I'm wondering if 0 is a special case.
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Cross-browser custom styling for file upload button [duplicate]
...ersonal preferences, but I couldn't find any really solid ways to do this without JS. I did find two other questions about this subject, but the answers there either involved JavaScript, or suggested Quirksmode's approach .
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Converting from a string to boolean in Python?
... do convert from a string to a boolean in Python? I found this link . But it doesn't look like a proper way to do it. I.e. using built-in functionality, etc.
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Could not load file or assembly 'Newtonsoft.Json' or one of its dependencies. Manifest definition do
...wing from my web.config:
<dependentAssembly>
<assemblyIdentity name="Newtonsoft.Json" publicKeyToken="30ad4fe6b2a6aeed" culture="neutral" />
<bindingRedirect oldVersion="0.0.0.0-6.0.0.0" newVersion="6.0.0.0" />
</dependentAssembly>
If you want to ensure all you...
Visualizing branch topology in Git
I'm playing with Git in isolation on my own machine, and I find it difficult to maintain a mental model of all my branches and commits. I know I can do a git log to see the commit history from where I am, but is there a way to see the entire branch topography, something like these ASCII maps that ...