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What does the @ symbol before a variable name mean in C#? [duplicate]
...name is recorded in the assembly as "class", vs. with an underscore it is "_class". Thus, if another .NET language doesn't define "class" as a reserved word, they could use the name just "class".
– P Daddy
Jan 9 '09 at 20:23
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Add single element to array in numpy
...swered Sep 7 '11 at 11:15
reader_1000reader_1000
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Reading a file line by line in Go
...since the OP asked to scan over a file, it would be trivial to first file, _ := os.Open("/path/to/file.csv") and then scan over the file handle: scanner := bufio.NewScanner(file)
– Evan Plumlee
Aug 18 '13 at 13:28
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How to check if an object is an array?
... {
Array.isArray = function(obj) {
return Object.prototype.toString.call(obj) === '[object Array]';
}
};
If you use jQuery you can use jQuery.isArray(obj) or $.isArray(obj). If you use underscore you can use _.isArray(obj)
If you don't need to detect arrays created in different frames you...
MySQL pagination without double-querying?
... help a lot.
The other way is to use SQL_CALC_FOUND_ROWS clause and then call SELECT FOUND_ROWS(). apart from the fact you have to put the FOUND_ROWS() call afterwards, there is a problem with this: There is a bug in MySQL that this tickles that affects ORDER BY queries making it much slower on lar...
How can I convert comma separated string into a List
...tList = csv.Split(',')
.Where(m => int.TryParse(m, out _))
.Select(m => int.Parse(m))
.ToList();
share
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Reshaping data.frame from wide to long format
...s melt/cast. Here is a solution with reshape, assuming your data frame is called d:
reshape(d,
direction = "long",
varying = list(names(d)[3:7]),
v.names = "Value",
idvar = c("Code", "Country"),
timevar = "Year",
times = 1950:1954)
...
Define global variable in a JavaScript function
...
Yes, as the others have said, you can use var at global scope (outside of all functions) to declare a global variable:
<script>
var yourGlobalVariable;
function foo() {
// ...
}
</script>
Alternately, you can assign to a property on window:
<script>
function foo() {
wi...
Streaming a video file to an html5 video player with Node.js so that the video controls continue to
...to get the size of the file without reading the whole file into memory. Finally, use fs.createReadStream to send the requested part to the client.
var fs = require("fs"),
http = require("http"),
url = require("url"),
path = require("path");
http.createServer(function (req, res) {
if ...
How to grep (search) committed code in the Git history
...s and the like), you need to do:
git grep <regexp> $(git rev-list --all)
git rev-list --all | xargs git grep <expression> will work if you run into an "Argument list too long" error.
If you want to limit the search to some subtree (for instance, "lib/util"), you will need to pass tha...