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HTML5 Pre-resize images before uploading
...le);
var ctx = canvas.getContext("2d");
ctx.drawImage(img, 0, 0);
var MAX_WIDTH = 800;
var MAX_HEIGHT = 600;
var width = img.width;
var height = img.height;
if (width > height) {
if (width > MAX_WIDTH) {
height *= MAX_WIDTH / width;
width = MAX_WIDTH;
}
} else {
if (height >...
How can I reset a react component including all transitively reachable state?
...oth deprecated in the new ES6 class-style reactjs. Use this.setState(this._getInitialState()) instead. Also you can't name your own state initializer function getInitialState() - react throws a warning - call it anything else and explicitly do state = this._getInitialState() in the top level of th...
node and Error: EMFILE, too many open files
...t:
file: /etc/pam.d/common-session (add to the end)
session required pam_limits.so
file: /etc/security/limits.conf (add to the end, or edit if already exists)
root soft nofile 40000
root hard nofile 100000
restart your nodejs and logout/login from ssh.
this may not work for older NodeJ...
How do I test a private function or a class that has private methods, fields or inner classes?
...n't work for me, but this made thigs clearer: java2s.com/Tutorial/Java/0125__Reflection/…
– Rob
Jul 1 '11 at 10:56
...
Default implementation for Object.GetHashCode()
...ect* obj) {
CONTRACTL
{
THROWS;
DISABLED(GC_NOTRIGGER);
INJECT_FAULT(FCThrow(kOutOfMemoryException););
MODE_COOPERATIVE;
SO_TOLERANT;
}
CONTRACTL_END;
VALIDATEOBJECTREF(obj);
DWORD idx = 0;
if (obj == 0) ...
How can I pass a list as a command-line argument with argparse?
...depending on how you want the user interface to behave).
nargs
parser.add_argument('-l','--list', nargs='+', help='<Required> Set flag', required=True)
# Use like:
# python arg.py -l 1234 2345 3456 4567
nargs='+' takes 1 or more arguments, nargs='*' takes zero or more.
append
parser.add_...
How to detect Safari, Chrome, IE, Firefox and Opera browser?
...amp; safari.pushNotification));
// Internet Explorer 6-11
var isIE = /*@cc_on!@*/false || !!document.documentMode;
// Edge 20+
var isEdge = !isIE && !!window.StyleMedia;
// Chrome 1 - 79
var isChrome = !!window.chrome && (!!window.chrome.webstore || !!window.chrome.runtime);
// E...
What is the overhead of creating a new HttpClient per call in a WebAPI client?
...tHandler. Just make sure you don't dispose the handler:
HttpClientHandler _sharedHandler = new HttpClientHandler(); //never dispose this
HttpClient GetClient(string token)
{
//client code can dispose these HttpClient instances
return new HttpClient(_sharedHandler, disposeHandler: false) ...
Static link of shared library function in gcc
...ent the name of the binary you want make portable, for example: nmap
./cde_2011-08-15_64bit nmap
The program will read all of libs linked to nmap and its dependencias and it will save all of them in a folder called cde-package/ (in the same directory that you are).
Finally, you can compress the...
Why does `a == b or c or d` always evaluate to True?
...gt; import ast
>>> ast.parse("if a == b or c or d or e: ...")
<_ast.Module object at 0x1031ae6a0>
>>> ast.dump(_)
"Module(body=[If(test=BoolOp(op=Or(), values=[Compare(left=Name(id='a', ctx=Load()), ops=[Eq()], comparators=[Name(id='b', ctx=Load())]), Name(id='c', ctx=Load())...