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What is the fastest way to check if a class has a function defined?
... also returns True if connection has an attribute connection.invert_opt = 'foo'.
– Robert Hönig
Nov 13 '17 at 12:47
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How to get element by class name? [duplicate]
...n value is an array-like object:
var y = document.getElementsByClassName('foo');
var aNode = y[0];
If, for some reason you need the return object as an array, you can do that easily, because of its magic length property:
var arrFromList = Array.prototype.slice.call(y);
//or as per AntonB's comme...
How can one print a size_t variable portably using the printf family?
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For C89, use %lu and cast the value to unsigned long:
size_t foo;
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printf("foo = %lu\n", (unsigned long) foo);
For C99 and later, use %zu:
size_t foo;
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printf("foo = %zu\n", foo);
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Should unit tests be written for getter and setters?
...t later on, this will reinforce your assumptions.
A common bug is void setFoo( Object foo ){ foo = foo; } where it should be void setFoo( Object foo ){ this.foo = foo; }. (In the first case the foo that is being written to is the parameter not the foo field on the object).
If you are returning an a...
CS0120: An object reference is required for the nonstatic field, method, or property 'foo'
Consider:
7 Answers
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Check if full path given
...It also returns true for absolute paths.
System.IO.Path.IsPathRooted(@"c:\foo"); // true
System.IO.Path.IsPathRooted(@"\foo"); // true
System.IO.Path.IsPathRooted("foo"); // false
System.IO.Path.IsPathRooted(@"c:1\foo"); // surprisingly also true
System.IO.Path.GetFullPath(@"c:1\foo");// returns "...
Is there a “not in” operator in JavaScript for checking object properties?
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Two quick possibilities:
if(!('foo' in myObj)) { ... }
or
if(myObj['foo'] === undefined) { ... }
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How do I implement __getattribute__ without an infinite recursion error?
... avoid the recursive hell you were in before.
Ipython output with code in foo.py:
In [1]: from foo import *
In [2]: d = D()
In [3]: d.test
Out[3]: 0.0
In [4]: d.test2
Out[4]: 21
Update:
There's something in the section titled More attribute access for new-style classes in the current documen...
Finding Variable Type in JavaScript
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Use typeof:
> typeof "foo"
"string"
> typeof true
"boolean"
> typeof 42
"number"
So you can do:
if(typeof bar === 'number') {
//whatever
}
Be careful though if you define these primitives with their object wrappers (which you should ...
Yank file name / path of current buffer in Vim
... has("mac") || has("gui_macvim") || has("gui_mac")
" relative path (src/foo.txt)
nnoremap <leader>cf :let @*=expand("%")<CR>
" absolute path (/something/src/foo.txt)
nnoremap <leader>cF :let @*=expand("%:p")<CR>
" filename (foo.txt)
nnoremap <leader&g...