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string.IsNullOrEmpty(string) vs. string.IsNullOrWhiteSpace(string)
...NullOrEmpty(value) || value.Trim().Length == 0;, which involves new string allocation and two separate checks. Most probably inside IsNullOrWhitespace it is done via single pass without any allocations by checking that each char in the string is the whitespace, hence superior performance. What confu...
read file from assets
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You double-allocate memory - first for the buffer and then for the String. Does not work for bigger files.
– JaakL
Jun 28 '17 at 10:10
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How to enter a multi-line command
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And don't forget to mention that some other tokens also act as line continuators e.g. | and {.
– Keith Hill
Jul 13 '10 at 14:40
1
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After submitting a POST form open a new window showing the result
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var urlAction = 'whatever.php';
var data = {param1:'value1'};
var $form = $('<form target="_blank" method="POST" action="' + urlAction + '">');
$.each(data, function(k,v){
$form.append('<input type="hidden" name="' + k + '" value="' + v ...
Why should I avoid std::enable_if in function signatures
...enable_if contains a nested template or type definition (hint: look for :: tokens), then the resolution of these nested tempatles or types are usually a non-deduced context. Any substitution failure on such a non-deduced context is an error.
the various conditions in multiple enable_if overloads can...
How can I create a two dimensional array in JavaScript?
...st dimension values initialized to run .map. Remember that Array will not allocate the positions until you order it to through .fill or direct value assignment.
var arr = Array(2).fill(null).map(() => Array(4));
arr[0][0] = 'foo';
console.info(arr);
Follow up
Here's a method tha...
How disable Copy, Cut, Select, Select All in UITextView
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This was the best working solution for me:
UIView *overlay = [[UIView alloc] init];
[overlay setFrame:CGRectMake(0, 0, myTextView.contentSize.width, myTextView.contentSize.height)];
[myTextView addSubview:overlay];
[overlay release];
from: https://stackoverflow.com/a/5704584/1293949
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Recommended Vim plugins for JavaScript coding? [closed]
...ack, I'm still a Vim noob):
In vim-autocomplpop/plugin/acp.vim I've added php and javascript (and actionscript) to behavs so that it looks like that :
let behavs = {
\ '*' : [],
\ 'ruby' : [],
\ 'python' : [],
\ 'perl' : [],
\ 'xml' ...
How can I test if a letter in a string is uppercase or lowercase using JavaScript?
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best answer by far, fast, not allocating any memory, or transforming data.
– Martijn Scheffer
Sep 6 '18 at 22:19
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SqlDataAdapter vs SqlDataReader
...ata in memory. Obviously with a DataTable or DataSet, you do have a memory allocation overhead.
If you don't need to keep your data in memory, so for rendering stuff only, go for the SqlDataReader. If you want to deal with your data in a disconnected fashion choose the DataAdapter to fill either a ...