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Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
...ck with the older iteratee API, but I recently verified that an equivalent test passes against the scalaz-stream API. This is a newer stream processing API that is intended to replace iteratee.
For completeness, here's the test code:
// create a stream containing `n` arrays with `sz` Ints in each ...
How to use range-based for() loop with std::map?
...ured bindings, which allows for the following:
std::map< foo, bar > testing = { /*...blah...*/ };
for ( const auto& [ k, v ] : testing )
{
std::cout << k << "=" << v << "\n";
}
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...
Why does javascript map function return undefined?
...an implement like a below logic.
Suppose you want an array of values.
let test = [ {name:'test',lastname:'kumar',age:30},
{name:'test',lastname:'kumar',age:30},
{name:'test3',lastname:'kumar',age:47},
{name:'test',lastname:'kumar',age:28},
{name:'...
Make body have 100% of the browser height
...
After testing various scenarios, I believe this is the best solution:
html {
width: 100%;
height: 100%;
display: table;
}
body {
width: 100%;
display: table-cell;
}
html, body {
margin: 0px;
padding: ...
How to have jQuery restrict file types on upload?
...se i used the following codes :
if (!(/\.(gif|jpg|jpeg|tiff|png)$/i).test(fileName)) {
alert('You must select an image file only');
}
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improve this...
PostgreSQL: How to make “case-insensitive” query
...) and upper() will give you a sequential
scan. It can't use indexes. On my test system, using lower() takes
about 2000 times longer than a query that can use an index. (Test data has a little over 100k rows.)
There are at least three less frequently used solutions that might be more effective.
U...
Deserialize json object into dynamic object using Json.net
...
As of Json.NET 4.0 Release 1, there is native dynamic support:
[Test]
public void DynamicDeserialization()
{
dynamic jsonResponse = JsonConvert.DeserializeObject("{\"message\":\"Hi\"}");
jsonResponse.Works = true;
Console.WriteLine(jsonResponse.message); // Hi
Console.Writ...
How to redirect 'print' output to a file using python?
...
This works perfectly:
import sys
sys.stdout=open("test.txt","w")
print ("hello")
sys.stdout.close()
Now the hello will be written to the test.txt file. Make sure to close the stdout with a close, without it the content will not be save in the file
...
Not equal != operator on NULL
...
The only test for NULL is IS NULL or IS NOT NULL. Testing for equality is nonsensical because by definition one doesn't know what the value is.
Here is a wikipedia article to read:
https://en.wikipedia.org/wiki/Null_(SQL)
...
Print a list of all installed node.js modules
...
Use npm ls (there is even json output)
From the script:
test.js:
function npmls(cb) {
require('child_process').exec('npm ls --json', function(err, stdout, stderr) {
if (err) return cb(err)
cb(null, JSON.parse(stdout));
});
}
npmls(console.log);
run:
> node test...