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Is there a standard sign function (signum, sgn) in C/C++?
...T val) {
return (T(0) < val) - (val < T(0));
}
Benefits:
Actually implements signum (-1, 0, or 1). Implementations here using copysign only return -1 or 1, which is not signum. Also, some implementations here are returning a float (or T) rather than an int, which seems wasteful.
Works ...
How do I run a Ruby file in a Rails environment?
...------
#!/usr/bin/env /Users/me/rails_project/script/rails runner
Product.all.each { |p| p.price *= 2 ; p.save! }
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How can I declare and define multiple variables in one line using C++?
I always though that if I declare these three variables that they will all have the value 0
10 Answers
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JavaScript, elegant way to check nested object properties for null/undefined [duplicate]
...e of using the app this gets populated. Let's say somwhere, after an AJAX call or something i do this:
4 Answers
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How to pass json POST data to Web API method as an object?
... with the result :)
});
Model binding works for some properties, but not all ! Why ?
If you do not decorate the web api method parameter with [FromBody] attribute
[HttpPost]
public CreateUserViewModel Save(CreateUserViewModel m)
{
return m;
}
And send the model(raw javascript object, not i...
How are msys, msys2, and msysgit related to each other?
...though it does that very well). It has a software building infrastructure called makepkg that allows the creation of recipes (PKGBUILD and patch files) for building software.
IMHO, the adoption of Pacman changes things significantly for open source development on Windows. Instead of everyone hackin...
Are there any suggestions for developing a C# coding standards / best practices document? [closed]
...recent AI graduate (circa 2 years) working for a modest operation. It has fallen to me (primarily as I'm the first 'adopter' in the department) to create a basic (read useful?) C# coding standards document.
...
Get current time in milliseconds in Python?
...illis = int(round(time.time() * 1000))
print millis
Quick'n'easy. Thanks all, sorry for the brain fart.
For reuse:
import time
current_milli_time = lambda: int(round(time.time() * 1000))
Then:
>>> current_milli_time()
1378761833768
...
How to retrieve checkboxes values in jQuery
...t works (see the example):
function updateTextArea() {
var allVals = [];
$('#c_b :checked').each(function() {
allVals.push($(this).val());
});
$('#t').val(allVals);
}
$(function() {
$('#c_b input').click(updateTextArea);
updateTextArea();
});
Update
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What is the difference between string primitives and String objects in JavaScript?
...rms of functionality. That aside, the behaviour you are trying to name is called auto-boxing. So what actually happens is that a primitive is converted to its wrapper type when a method of the wrapper type is invoked. Put simple:
var s = 'test';
Is a primitive data type. It has no methods, it is ...