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Are JavaScript strings immutable? Do I need a “string builder” in JavaScript?
...e it slower...
function StringBuilder() {
this._array = [];
this._index = 0;
}
StringBuilder.prototype.append = function (str) {
this._array[this._index] = str;
this._index++;
}
StringBuilder.prototype.toString = function () {
return this._array.join('');
}
Here are performa...
Speed up the loop operation in R
...
Biggest problem and root of ineffectiveness is indexing data.frame, I mean all this lines where you use temp[,].
Try to avoid this as much as possible. I took your function, change indexing and here version_A
dayloop2_A <- function(temp){
res <- numeric(nrow(te...
Fastest Way to Find Distance Between Two Lat/Long Points
...l 5.7.5, InnoDB tables now also support SPATIAL indices.
Create a SPATIAL index on these points
Use MBRContains() to find the values:
SELECT *
FROM table
WHERE MBRContains(LineFromText(CONCAT(
'('
, @lon + 10 / ( 111.1 / cos(RADIANS(@lon)))
, ' '
, @lat + 10 /...
renderpartial with null model gets passed the wrong type
...
This doesn't seem to answer the question.
– John Saunders
Aug 20 '12 at 14:21
6
...
ASP.NET MVC: What is the purpose of @section? [closed]
...tion, I saw this blog article .
The author ScottGu adds @section to the Index.cshtml.
4 Answers
...
Get selected element's outer HTML
I'm trying to get the HTML of a selected object with jQuery. I am aware of the .html() function; the issue is that I need the HTML including the selected object (a table row in this case, where .html() only returns the cells inside the row).
...
Passing arrays as url parameter
...ing into issues with http_build_query returning param[] and somtimes param[index]. Check out this post: stackoverflow.com/questions/11996573/…
– stwhite
Jul 23 '17 at 17:33
...
How do I change the root directory of an apache server? [closed]
...e2/apache2.conf
and find this
<Directory /var/www/html/>
Options Indexes FollowSymLinks
AllowOverride None
Require all granted
</Directory>
and change /var/www/html to your preferred directory
and save it.
After you saved your changes, just restart the apache2 webserver and you'l...
How to get distinct values from an array of objects in JavaScript?
...": "Carl", "age": 35 }
];
array.map(item => item.age)
.filter((value, index, self) => self.indexOf(value) === index)
> [17, 35]
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How to name and retrieve a stash by name in git?
...p it in the stash stack, type:
git stash apply stash@{n}
Where n is the index of the stashed change.
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