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advantage of tap method in ruby
...iately clear. A reader would not have to read what is inside the block to know that an instance user is created.
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What is the difference between memmove and memcpy?
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@Alcott, don't use memcpy if you don't know that they don't overlap - use memmove instead. When there is no overlap, memmove and memcpy are equivalent (although memcpy might be very, very, very slightly faster).
– bdonlan
Sep ...
What is the difference between static func and class func in Swift?
...al. For more information. See nextD's answer below. Also x.dynamicType has now been replaced with type(of:x)
– Honey
Jan 16 '17 at 2:54
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Why is using “for…in” for array iteration a bad idea?
...mewhere deep in your JavaScript library...
Array.prototype.foo = 1;
// Now you have no idea what the below code will do.
var a = [1, 2, 3, 4, 5];
for (var x in a){
// Now foo is a part of EVERY array and
// will show up here as a value of 'x'.
console.log(x);
}
/* Will disp...
How bad is shadowing names defined in outer scopes?
...t as yadda but miss one of the places it is used in the function's body... Now data refers to the global, and you start having weird behaviour - where you would have a much more obvious NameError if you didn't have a global name data.
Also remember that in Python everything is an object (including...
Vertically centering a div inside another div [duplicate]
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Modern solution (transform)
Since transforms are fairly well supported now there is an easier way to do it.
CSS
.cn {
position: relative;
width: 500px;
height: 500px;
}
.inner {
position: absolute;
top: 50%; left: 50%;
transform: translate(-50%,-50%);
width: 200px;
height: 200...
What is the difference between varchar and nvarchar?
... and Unicode is the cure for codepage problems. With cheap disk and memory nowadays, there is really no reason to waste time mucking around with code pages anymore.
All modern operating systems and development platforms use Unicode internally. By using nvarchar rather than varchar, you can avoid do...
Is it possible to use jQuery .on and hover?
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@soupy1976 Edited my answer, it now takes into account elements populated with JavaScript.
– Sethen
Dec 11 '12 at 17:21
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Why does Git treat this text file as a binary file?
...y means that when git inspects the actual content of the file (it doesn't know that any given extension is not a binary file - you can use the attributes file if you want to tell it explicitly - see the man pages).
Having inspected the file's contents it has seen stuff that isn't in basic ascii cha...
List of Rails Model Types
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I think this might be a more accurate link, now api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/…
– Randy Burgess
Aug 12 '13 at 21:42
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