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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
...is.FindEntry(key) >= 0);
}
so TryGetValue is just ContainsKey plus an array lookup if the item is present.
Source
It appears that TryGetValue will be almost twice as fast as ContainsKey+Item combination.
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Passing data between controllers in Angular JS?
...ProductController, define some action that adds the selected object to the array:
app.controller('ProductController', function($scope, productService) {
$scope.callToAddToProductList = function(currObj){
productService.addProduct(currObj);
};
});
In your CartController, get the pr...
How can I pass a Bitmap object from one activity to another
...result in a "JAVA BINDER FAILURE" error. Try passing the bitmap as a byte array and building it for display in the next activity.
I shared my solution here:
how do you pass images (bitmaps) between android activities using bundles?
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What do ellipsis […] mean in a list?
...not create an "infinite list" in Python because lists are indeed resizable arrays, not linked lists. An "infinite list" in Common Lisp could instead be created with #1=(1 . #1#).
– 6502
Jun 18 '13 at 20:09
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How to implement “select all” check box in HTML?
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Never use for in with a collection or array
– mplungjan
Apr 6 '13 at 6:59
1
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The Guava library: What are its most useful and/or hidden features? [closed]
...It's really just an optimization, that creates a lookup table (using a bit array), and then simply looks up characters to see if they "match".
It's the kind of hidden optimization you can leverage when you use a library, that you might not have thought of yourself in your own code.
Of course,
if ...
How to fix getImageData() error The canvas has been tainted by cross-origin data?
...revent hackers from uploading PHP scripts and pwning your system
if(!@is_array(getimagesize($url))){
echo "path/to/placeholderImage.png";
exit("wrong file type.");
}
$img = file_get_contents($url);
$fn = substr(strrchr($url, "/"), 1);
file_put_contents($fn,$img);
echo $fn;
?&g...
How to mock ConfigurationManager.AppSettings with moq
...ving strongly typed information to work with rather than weakly typed hash arrays.
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How to Find And Replace Text In A File With C#
...eadAllLines(file);
YOu can then loop through and replace the text in the array.
var writer = new StreamWriter(GetFileName(baseFolder, prefix, num));
for (int i = 0; i < arr.Length; i++)
{
string line = arr[i];
line.Replace("match", "new value");
writer.WriteLine(line);
}
this m...
How to get a password from a shell script without echoing
...and options, in bash, type "help read".
$ help read
read: read [-ers] [-a array] [-d delim] [-i text] [-n nchars] [-N nchars] [-p prompt] [-t timeout] [-u fd] [name ...]
Read a line from the standard input and split it into fields.
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-p prompt output the string PROMPT without a trailing newli...