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How to make clang compile to llvm IR
...
Given some C/C++ file foo.c:
> clang -S -emit-llvm foo.c
Produces foo.ll which is an LLVM IR file.
The -emit-llvm option can also be passed to the compiler front-end directly, and not the driver by means of -cc1:
> clang -cc1 foo.c -emi...
Getting SyntaxError for print with keyword argument end=' '
... isn't available in Python 2.x because print is still a statement.
print("foo" % bar, end=" ")
in Python 2.x is identical to
print ("foo" % bar, end=" ")
or
print "foo" % bar, end=" "
i.e. as a call to print with a tuple as argument.
That's obviously bad syntax (literals don't take keyword...
Remove NA values from a vector
... I remove NA values from a vector?
Here it is:
Assume you have a vector foo as follows:
foo = c(1:10, NA, 20:30)
running length(foo) gives 22.
nona_foo = foo[!is.na(foo)]
length(nona_foo) is 21, because the NA values have been removed.
Remember is.na(foo) returns a boolean matrix, so ind...
Mongoose and multiple database in single node.js project
...roject, one mongoose installation and one mongoose instance.
-app_root/
--foo_app/
---db_access.js
---foo_db_connect.js
---node_modules/
----mongoose/
--bar_app/
---db_access.js
---bar_db_connect.js
---node_modules/
----mongoose/
In foo_db_connect.js
var mongoose = require('mongoose');
mongoose....
“X does not name a type” error in C++
...efined is called an incomplete type.
Consider the simpler example:
struct foo; // foo is *declared* to be a struct, but that struct is not yet defined
struct bar
{
// this is okay, it's just a pointer;
// we can point to something without knowing how that something is defined
foo* fp; ...
Is it good practice to NULL a pointer after deleting it?
...hat different) avoids crashes on double deletes.
Consider the following:
Foo* foo = 0; // Sets the pointer to 0 (C++ NULL)
delete foo; // Won't do anything
Whereas:
Foo* foo = new Foo();
delete foo; // Deletes the object
delete foo; // Undefined behavior
In other words, if you don't set dele...
Get elements by attribute when querySelectorAll is not available without using libraries?
...ns getElementsByTagName('*'), and returns only those elements with a "data-foo" attribute:
function getAllElementsWithAttribute(attribute)
{
var matchingElements = [];
var allElements = document.getElementsByTagName('*');
for (var i = 0, n = allElements.length; i < n; i++)
{
if (allE...
Proper way to declare custom exceptions in modern Python?
...tended for deprecation? Python 3.7 still seems to happily accept Exception(foo, bar, qux).
– mtraceur
Apr 20 '18 at 22:36
...
Simple Getter/Setter comments
...etter off without this kind of crap cluttering your code:
/**
* Sets the foo.
*
* @param foo the foo to set
*/
public void setFoo(float foo);
Very useful, if warranted:
/**
* Foo is the adjustment factor used in the Bar-calculation. It has a default
* value depending on the Baz type, but ...
How can you set class attributes from variable arguments (kwargs) in python
...
You can use the setattr() method:
class Foo:
def setAllWithKwArgs(self, **kwargs):
for key, value in kwargs.items():
setattr(self, key, value)
There is an analogous getattr() method for retrieving attributes.
...