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Remove duplicates from a List in C#
... only return distinct values. Alternatively you could copy values to a new array or list.
– JHubbard80
Oct 25 '13 at 17:08
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How can I convert an image into a Base64 string?
...the Base64 Android class:
String encodedImage = Base64.encodeToString(byteArrayImage, Base64.DEFAULT);
You'll have to convert your image into a byte array though. Here's an example:
Bitmap bm = BitmapFactory.decodeFile("/path/to/image.jpg");
ByteArrayOutputStream baos = new ByteArrayOutputStream...
Difference between java.lang.RuntimeException and java.lang.Exception
...eptions that can be prevented programmatically. E.g NullPointerException, ArrayIndexOutOfBoundException. If you check for null before calling any method, NullPointerException would never occur. Similarly ArrayIndexOutOfBoundException would never occur if you check the index first. RuntimeException ...
strdup() - what does it do in C?
...
strdup() does dynamic memory allocation for the character array including the end character '\0' and returns the address of the heap memory:
char *strdup (const char *s)
{
char *p = malloc (strlen (s) + 1); // allocate memory
if (p != NULL)
strcpy (p,s); ...
How to get the focused element with jQuery?
...ocus')[0] will give you the actual element.
$(':focus') will give you an array of elements, usually only one element is focused at a time so this is only better if you somehow have multiple elements focused.
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Check if Key Exists in NameValueCollection
... // I'm using Keys instead of AllKeys because AllKeys, being a mutable array,
// can get out-of-sync if mutated (it weirdly re-syncs when you modify the collection).
// I'm also not 100% sure that OrdinalIgnoreCase is the right comparer to use here.
// The MSDN docs only ...
Secure random token in Node.js
...);
}
var randomBytes = crypto.randomBytes(length);
var result = new Array(length);
var cursor = 0;
for (var i = 0; i < length; i++) {
cursor += randomBytes[i];
result[i] = chars[cursor % charsLength];
}
return result.join('');
}
/** Sync */
function randomAsciiString(len...
How to create a file in memory for user to download, but not through server?
...
For AngularJS 1.x apps, you can build an array of Urls as they are created and then clean them up in the $onDestroy function of the component. This is working great for me.
– Splaktar
Sep 6 '16 at 18:12
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Include all existing fields and add new fields to document
...ollection posts with _id, title, body, likes fields. The likes field is an array of user _id who like the post. How could you list all posts with all the _id, title, body, likeCount? Returning all fields is a direct purpose in this case.
– doc_id
Oct 6 '17 at 2...
Split Java String by New Line
...e separator use split("\\R").
If you don't want to remove from resulting array trailing empty strings "" use split(regex, limit) with negative limit parameter like split("\\R", -1).
If you want to treat one or more continues empty lines as single delimiter use split("\\R+").
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