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How to unpack and pack pkg file?
...u really do just need to edit one of the info files, that's simple:
mkdir Foo
cd Foo
xar -xf ../Foo.pkg
# edit stuff
xar -cf ../Foo-new.pkg *
But if you need to edit the installable files:
mkdir Foo
cd Foo
xar -xf ../Foo.pkg
cd foo.pkg
cat Payload | gunzip -dc |cpio -i
# edit Foo.app/*
rm Payloa...
Find object by id in an array of JavaScript objects
...
Use the find() method:
myArray.find(x => x.id === '45').foo;
From MDN:
The find() method returns the first value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned.
If you want to find its index instead, use ...
How to fix “ImportError: No module named …” error in Python?
...
Do you have a file called __init__.py in the foo directory? If not then python won't recognise foo as a python package.
See the section on packages in the python tutorial for more information.
...
Add new methods to a resource controller in Laravel
... to that method separately, before you register the resource:
Route::get('foo/bar', 'FooController@bar');
Route::resource('foo', 'FooController');
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How to convert a std::string to const char* or char*?
...st character pointer.
1. Use the contiguous storage of C++11
std::string foo{"text"};
auto p = &*foo.begin();
Pro
Simple and short
Fast (only method with no copy involved)
Cons
Final '\0' is not to be altered / not necessarily part of the non-const memory.
2. Use std::vector<CharT...
How do I replace the *first instance* of a string in .NET?
...ample:
using System.Text.RegularExpressions;
...
Regex regex = new Regex("foo");
string result = regex.Replace("foo1 foo2 foo3 foo4", "bar", 1);
// result = "bar1 foo2 foo3 foo4"
The third parameter, set to 1 in this case, is the number of occurrences of the regex pattern that you wa...
How to cast Object to its actual type?
...on
obj.GetType().GetMethod("MyFunction").Invoke(obj, null);
// interface
IFoo foo = (IFoo)obj; // where SomeType : IFoo and IFoo declares MyFunction
foo.MyFunction();
// dynamic
dynamic d = obj;
d.MyFunction();
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inline conditionals in angular.js
...rn input ? trueValue : falseValue;
};
});
and can be used like this:
{{foo == "bar" | iif : "it's true" : "no, it's not"}}
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...
Is it better to return null or empty collection?
...ut properties, always set your property once and forget it
public List<Foo> Foos {public get; private set;}
public Bar() { Foos = new List<Foo>(); }
In .NET 4.6.1, you can condense this quite a lot:
public List<Foo> Foos { get; } = new List<Foo>();
When talking about m...
How does type Dynamic work and how to use it?
...four different methods:
selectDynamic - allows to write field accessors: foo.bar
updateDynamic - allows to write field updates: foo.bar = 0
applyDynamic - allows to call methods with arguments: foo.bar(0)
applyDynamicNamed - allows to call methods with named arguments: foo.bar(f = 0)
To use one ...