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Which is more efficient, a for-each loop, or an iterator?
...owing two Java snippets. First the for loop:
List<Integer> a = new ArrayList<Integer>();
for (Integer integer : a)
{
integer.toString();
}
// Byte code
ALOAD 1
INVOKEINTERFACE java/util/List.iterator()Ljava/util/Iterator;
ASTORE 3
GOTO L2
L3
ALOAD 3
INVOKEINTERFACE java/util/It...
How to convert byte array to Bitmap
...ieve it but when i convert it to Bitmap using
BitmapFactory.decodeByteArray(...) it return null.
2 Answers
...
MongoDB, remove object from array
...
I have a document like
I have to delete address from address array
After searching lots on internet I found the solution
Customer.findOneAndUpdate(query, {$pull: {address: addressId}}, function(err, data){
if(err) {
return res.status(500).json({'error' : 'error in d...
What's the difference between console.dir and console.log?
... false
lastIndex: 0
...
You can also see a clear difference with arrays (e.g., console.dir([1,2,3])) which are logged differently from normal objects:
> console.log([1,2,3])
[1, 2, 3]
> console.dir([1,2,3])
* Array[3]
0: 1
1: 2
2: 3
length: 3
* __proto__: Array[...
How to merge YAML arrays?
I would like to merge arrays in YAML, and load them via ruby -
5 Answers
5
...
Import package.* vs import package.SpecificType [duplicate]
...with the same name in different packages.
For example:
java.lang.reflect.Array
java.sql.Array
So, if you import java.lang.reflect.* and java.sql.* you'll have a collision on the Array type, and have to fully qualify them in your code.
Importing specific classes instead will save you this hassle...
laravel throwing MethodNotAllowedHttpException
... scale if the controller method/class changes).
Route::post('/validate', array(
'as' => 'validate',
'uses' => 'MemberController@validateCredentials'
));
In the form use the following
<?php echo Form::open(array('route' => 'validate')); ?>
...
How to go from Blob to ArrayBuffer
I was studying Blobs, and I noticed that when you have an ArrayBuffer, you can easily convert this to a Blob as follows:
6 ...
How do I catch a numpy warning like it's an exception (not just for testing)?
... option for numpy.seterr:
>>> import numpy as np
>>> np.array([1])/0 #'warn' mode
__main__:1: RuntimeWarning: divide by zero encountered in divide
array([0])
>>> np.seterr(all='print')
{'over': 'warn', 'divide': 'warn', 'invalid': 'warn', 'under': 'ignore'}
>>>...
How to count items in JSON object using command line?
...-line JSON processor:
jq length /tmp/test.json
Prints the length of the array of objects.
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