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How do you performance test JavaScript code?
...Sometimes the difference is HUGE and worth knowing.
You could just use javascript timers. But I typically get much more consistent results using the native Chrome (now also in Firefox and Safari) devTool methods console.time() & console.timeEnd()
Example of how I use it:
var iterations = 1000000...
JSON: why are forward slashes escaped?
..."A", but it's not required. Allowing \/ helps when embedding JSON in a <script> tag, which doesn't allow </ inside strings, like Seb points out.
Some of Microsoft's ASP.NET Ajax/JSON API's use this loophole to add extra information, e.g., a datetime will be sent as "\/Date(milliseconds)\/"...
Python Progress Bar
How do I use a progress bar when my script is doing some task that is likely to take time?
33 Answers
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What to do Regular expression pattern doesn't match anywhere in string?
...print "xhook " when / \G (?&xhook) $RX_SUBS /xgc;
print "script " when / \G (?&script) $RX_SUBS /xgc;
print "style " when / \G (?&style) $RX_SUBS /xgc;
print "comment " when / \G (?&comment) $RX_SUBS /xgc;
print "tag " when / \G (?...
How can I print each command before executing? [duplicate]
What is the best way to set up a Bash script that prints each command before it executes it?
4 Answers
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Why is printing to stdout so slow? Can it be sped up?
...term and got significantly better results. Below is the output of my test script (at the bottom of the question) when running in wterm at 1920x1200 in on the same system where the basic print option took 12s using gnome-terminal:
-----
timing summary (100k lines each)
-----
print ...
AngularJS - Access to child scope
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How to do this in Type Script ?
– ATHER
Jan 23 '16 at 3:38
Best An...
How to resize an image to fit in the browser window?
...
Update 2018-04-11
Here's a Javascript-less, CSS-only solution. The image will dynamically be centered and resized to fit the window.
<html>
<head>
<style>
* {
margin: 0;
padding: 0;
}
....
AngularJS : Where to use promises?
....
This is a standard pattern for handling asynchronous operations in JavaScript and other languages.
One big problem with this pattern arises when you need to perform a sequence of asynchronous operations, where each successive operation depends on the result of the previous operation. That's wh...
Create SQLite Database and table [closed]
...Lite DLL's
You can find the NuGet way here:
NuGet
Up next is the create script.
Creating a database file:
SQLiteConnection.CreateFile("MyDatabase.sqlite");
SQLiteConnection m_dbConnection = new SQLiteConnection("Data Source=MyDatabase.sqlite;Version=3;");
m_dbConnection.Open();
string sql = "c...