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How do I check if file exists in jQuery or pure JavaScript?
...tus!=404;
}
Small changes and it could check for status HTTP status code 200 (success), instead.
EDIT 2: Since sync XMLHttpRequest is deprecated, you can add a utility method like this to do it async:
function executeIfFileExist(src, callback) {
var xhr = new XMLHttpRequest()
xhr.onready...
Why do we need argc while there is always a null at the end of argv?
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Yes, argv[argc]==NULL is guaranteed. See C11 5.1.2.2.1 Program startup (my emphasis)
If they are declared, the parameters to the main function shall obey
the following constraints:
The value of argc shall be nonnegative.
argv[argc] shall be a null
pointer.
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How to explain Katana and OWIN in simple words and uses?
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412
Regarding the comment above, OWIN is not a framework. OWIN is a specification on how web servers...
How to turn a String into a JavaScript function call? [duplicate]
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edited Feb 21 at 22:19
Callum Watkins
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Check if list is empty in C# [closed]
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answered Sep 18 '13 at 8:22
Tim SchmelterTim Schmelter
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Why does the C++ map type argument require an empty constructor when using []?
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baydabayda
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Lightweight Java Object cache API [closed]
...les.
CacheManager cacheManager = CacheManager.getInstance();
int oneDay = 24 * 60 * 60;
Cache memoryOnlyCache = new Cache("name", 200, false, false, oneDay, oneDay);
cacheManager.addCache(memoryOnlyCache);
Creates a cache that will hold 200 elements, and has a ttl of 24 hours.
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How to access the first property of a Javascript object?
...ll major browsers implementations, please read https://stackoverflow.com/a/23202095 for details on this.
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how to use adb command to push a file on device without sd card
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edited Aug 15 '18 at 21:49
answered Dec 30 '13 at 6:42
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Add a column to a table, if it does not already exist
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You can use a similar construct by using the sys.columns table io sys.objects.
IF NOT EXISTS ...