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Why does isNaN(“ ”) (string with spaces) equal false?
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JavaScript interprets an empty string as a 0, which then fails the isNAN test. You can use parseInt on the string first which won't convert the empty string to 0. The result should then fail isNAN.
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How to debug a Flask app
...r PowerShell, use $env:
$env:FLASK_ENV = "development"
Prior to Flask 1.0, this was controlled by the FLASK_DEBUG=1 environment variable instead.
If you're using the app.run() method instead of the flask run command, pass debug=True to enable debug mode.
Tracebacks are also printed to the termi...
How do I install a plugin for vim?
... ln File.join(plugin_dir, f), File.join(vim_dir,f)
end
boldred = "\033[1;31m"
clear = "\033[0m"
puts "\nDone. Remember to #{boldred}:helptags ~/.vim/doc#{clear}"
end
task :uninstall do
vim_dir = File.expand_path("~/.vim")
plugin_dir = Dir.pwd
Dir["**/*.{txt,snippet,snippets...
Escape quote in web.config connection string
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107
Use " instead of " to escape it.
web.config is an XML file so you should use XML esca...
Is Chrome's JavaScript console lazy about evaluating arrays?
...t bug that explains this issue: https://bugs.webkit.org/show_bug.cgi?id=35801 (EDIT: now fixed!)
There appears to be some debate regarding just how much of a bug it is and whether it's fixable. It does seem like bad behavior to me. It was especially troubling to me because, in Chrome at least, it...
What does the arrow operator, '->', do in Java?
... johannchopin
4,84855 gold badges1818 silver badges4040 bronze badges
answered Feb 28 '13 at 21:35
Óscar LópezÓscar López
207k...
AutoLayout with hidden UIViews?
...best way using AutoLayout to respond to hidden views as if their frame was 0x0. Here is an example of a dynamic list of 1-3 features.
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What is the maximum length of data I can put in a BLOB column in MySQL?
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250
A BLOB can be 65535 bytes (64 KB) maximum.
If you need more consider using:
a MEDIUMBLOB for...
Removing rounded corners from a element in Chrome/Webkit
...elect> element. I've tried getting rid of this by applying a radius of 0px through my external stylesheet, as well inline on the element itself; I've tried both border-radius:0px and -webkit-border-radius:0px; and I've tried the even more specific border-top-left-radius:0px (along with it...