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SQLite DateTime comparison
...reliable results from the query against a sqlite database using a datetime string as a comparison as so:
12 Answers
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How does the HyperLogLog algorithm work?
...n be of different sizes. One element can be 1 another element "is this big string". So if you have a huge list (or a huge stream of elements) it will take a lot memory.
Probabilistic Counting
How can one get a reasonable estimate of a number of unique elements? Assume that you have a string of l...
How to see query history in SQL Server Management Studio
...ight tracing filtered on your login or host name (but please use a server-side trace, not Profiler, for this).
As @Nenad-Zivkovic commented, it might be helpful to join on sys.dm_exec_query_stats and order by last_execution_time:
SELECT t.[text], s.last_execution_time
FROM sys.dm_exec_cached_pla...
Html code as IFRAME source rather than a URL
...an do this with a data URL. This includes the entire document in a single string of HTML. For example, the following HTML:
<html><body>foo</body></html>
can be encoded as this:
data:text/html;charset=utf-8,%3Chtml%3E%3Cbody%3Efoo%3C/body%3E%3C/html%3E
and then set as ...
Applying function with multiple arguments to create a new pandas column
...ution! in case anyone is wondering vectorize works well and super fast for string comparison functions as well.
– infiniteloop
Apr 28 at 11:24
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关于php的socket初探 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...t($socket, -1)) { // 这样设置不超时才油用
static $id = 0;
static $ct = 0;
$ct_last = $ct;
$ct_data = '';
$buffer = '';
$id++; // increase on each accept
echo "Client $id come./n";
...
What is the most efficient way to store a list in the Django models?
...key relationship to a Friends table? I understand that myFriends are just strings but I would think that a better design would be to create a Friend model and have MyClass contain a foreign key realtionship to the resulting table.
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Linq code to select one item
...use the extension methods directly like:
var item = Items.First(i => i.Id == 123);
And if you don't want to throw an error if the list is empty, use FirstOrDefault which returns the default value for the element type (null for reference types):
var item = Items.FirstOrDefault(i => i.Id == ...
How to submit a form with JavaScript by clicking a link?
...
<input type="submit" value="submit" />
The best JS way
<form id="form-id">
<button id="your-id">submit</button>
</form>
var form = document.getElementById("form-id");
document.getElementById("your-id").addEventListener("click", function () {
form.submit();
}...
Which letter of the English alphabet takes up most pixels?
...
for(var i = capsIndex; i < capsIndex + 26; i++) {
div.innerText = String.fromCharCode(i);
var computedWidth = window.getComputedStyle(div, null).getPropertyValue("width");
if(highestWidth < parseFloat(computedWidth)) {
highestWidth = parseFloat(computedWidth);
...