大约有 45,000 项符合查询结果（耗时：0.1003秒） [XML]
How to check the extension of a filename in a bash script?
...nk you want to say "Are the last four characters of $file equal to .txt?" If so, you can use the following:
if [ ${file: -4} == ".txt" ]
Note that the space between file: and -4 is required, as the ':-' modifier means something different.
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Check if list is empty in C# [closed]
...t of objects populated from a database. I need to display an error message if the list is empty and display a grid view otherwise.
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How to check if IEnumerable is null or empty?
...ch? Maybe some collection helper class? The reason I am asking is that in if statements the code looks cluttered if the patter is (mylist != null && mylist.Any()) . It would be much cleaner to have Foo.IsAny(myList) .
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jQuery on window resize
... an example using jQuery, javascript and css to handle resize events.
(css if your best bet if you're just stylizing things on resize (media queries))
http://jsfiddle.net/CoryDanielson/LAF4G/
css
.footer
{
/* default styles applied first */
}
@media screen and (min-height: 820px) /* height &...
Detect if a jQuery UI dialog box is open
I am using a jQuery UI dialog. If it is open, I want to do one thing. If it is closed, I want to do another.
5 Answers
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How to determine if a string is a number with C++?
I've had quite a bit of trouble trying to write a function that checks if a string is a number. For a game I am writing I just need to check if a line from the file I am reading is a number or not (I will know if it is a parameter this way). I wrote the below function which I believe was working s...
What is “assert” in JavaScript?
...ing some library that provides one. The usual meaning is to throw an error if the expression passed into the function is false; this is part of the general concept of assertion checking. Usually assertions (as they're called) are used only in "testing" or "debug" builds and stripped out of productio...
Effective way to find any file's Encoding
...s determining a file's endianness, by analyzing its byte order mark (BOM). If the file does not have a BOM, this cannot determine the file's encoding.
*UPDATED 4/08/2020 to include UTF-32LE detection and return correct encoding for UTF-32BE
/// <summary>
/// Determines a text file's encoding...
Check if an element is a child of a parent
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If you are only interested in the direct parent, and not other ancestors, you can just use parent(), and give it the selector, as in target.parent('div#hello').
Example: http://jsfiddle.net/6BX9n/
function fun(evt) {
va...
Does the ternary operator exist in R?
... asks, is there a control sequence in R similar to C's ternary operator ? If so, how do you use it? Thanks!
7 Answers
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