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Javascript: best Singleton pattern [duplicate]
...rsion
class Singleton {
static instance;
constructor() {
if (instance) {
return instance;
}
this.instance = this;
}
foo() {
// ...
}
}
console.log(new Singleton() === new Singleton());
(2) ES6 Version
class Singleton {
const...
How to add a WiX custom action that happens only on uninstall (via MSI)?
I would like to modify an MSI installer (created through WiX ) to delete an entire directory on uninstall.
6 Answers
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Can I load a UIImage from a URL?
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@Daniel: it does work if I use a string constant instead of the NSString I was passing in. So this latest problem was something wrong with my NSString, not a problem with the NSURL/NSData/UIImage code which works. Thanks Daniel!
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Implicit “Submit” after hitting Done on the keyboard at the last EditText
I've used some apps where when I fill my username, then go to my password, if I hit "Done" on the keyboard, the login form is automatically submitted, without me having to click the submit button. How is this done?
...
Apply function to all elements of collection through LINQ [duplicate]
I have recently started off with LINQ and its amazing. I was wondering if LINQ would allow me to apply a function - any function - to all the elements of a collection, without using foreach. Something like python lambda functions.
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How does a public key verify a signature?
... key to obtain a message, supposedly the same message as (1) but we don't know yet. We now have two messages that we need to verify are identical. So to do this, we will encrypt them both with our public key and compare the two hashes. So we will ....
Encrypt the original message (1) with the public...
How to get nice formatting in the Rails console
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Its now YAML::ENGINE.yamler = 'psych'
– jumpa
Dec 5 '13 at 5:53
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How to delay the .keyup() handler until the user stops typing?
I’ve got a search field. Right now it searches for every keyup. So if someone types “Windows”, it will make a search with AJAX for every keyup: “W”, “Wi”, “Win”, “Wind”, “Windo”, “Window”, “Windows”.
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How to pass command line arguments to a shell alias? [duplicate]
...o whatever you pass after that alias is ALSO passed on the command line. If you try this set -x; alias serve="python -m SimpleHTTPServer $1 &" you will see the error/problem. Both your argument and the alias command are run as separate commands.
– PatS
F...
Visual Studio, Find and replace, regex
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It is now different in Visual Studio 2012. $1 should be used instead of \1. () now replaces {}. More consistant with everyone else now. msdn.microsoft.com/en-us/library/2k3te2cs(v=vs.110).aspx
– oillio
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