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Detecting endianness programmatically in a C++ program
...
You can do it by setting an int and masking off bits, but probably the easiest way is just to use the built in network byte conversion ops (since network byte order is always big endian).
if ( htonl(47) == 47 ) {
// Big endian
} else {
// Little endian.
}
Bit fiddling could be faster, but th...
Which SQL query is faster? Filter on Join criteria or Where clause?
Compare these 2 queries. Is it faster to put the filter on the join criteria or in the WHERE clause. I have always felt that it is faster on the join criteria because it reduces the result set at the soonest possible moment, but I don't know for sure.
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How to style CSS role
... edited May 12 '14 at 14:21
Carrie Kendall
10.5k55 gold badges5656 silver badges7979 bronze badges
answered Oct 15 '12 at 9:28
...
What's the “average” requests per second for a production web application?
... Wow, that is pretty slow for wikipedia
– Joseph Persie
Jan 14 '16 at 4:56
9
@JosephPersie Don't ...
variable === undefined vs. typeof variable === “undefined”
... whereas a typeof check never will.
For example, the following is used in IE for parsing XML:
var x = new ActiveXObject("Microsoft.XMLDOM");
To check whether it has a loadXML method safely:
typeof x.loadXML === "undefined"; // Returns false
On the other hand:
x.loadXML === undefined; // Thro...
What is the difference between decodeURIComponent and decodeURI?
...s intended to be used on .. well .. URI components that is
any part that lies between separators (; / ? : @ & = + $ , #).
So, in encodeURIComponent these separators are encoded also because they are regarded as text and not special characters.
Now back to the difference between the decode fu...
Ruby, remove last N characters from a string?
...uby 2.5+
As of Ruby 2.5 you can use delete_suffix or delete_suffix! to achieve this in a fast and readable manner.
The docs on the methods are here.
If you know what the suffix is, this is idiomatic (and I'd argue, even more readable than other answers here):
'abc123'.delete_suffix('123') # ...
Python equivalent for PHP's implode?
...he words with this method:
concatenatedString = ' - '.join(myWordList)
# ie: delimeter.join(list)
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How do I remove a property from a JavaScript object?
...perator is used to remove these keys, more commonly known as object properties, one at a time.
var obj = {
myProperty: 1
}
console.log(obj.hasOwnProperty('myProperty')) // true
delete obj.myProperty
console.log(obj.hasOwnProperty('myProperty')) // false
The delete operator doe...
jQuery `.is(“:visible”)` not working in Chrome
...the definition of :visible has changed slightly
jQuery 3 slightly modifies the meaning of :visible (and therefore of
:hidden).
Starting with this version, elements will be considered
:visible if they have any layout boxes, including those of zero width
and/or height. For example, br elem...