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What do {curly braces} around javascript variable name mean [duplicate]
...illa JS extensions (use moz) and this however after reading it I still don't understand why it is used
1 Answer
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【iOS】有关苹果iOS App的一些进展、BluetoothLE蓝牙拓展等 - App Inventor...
...nts that Apple puts on apps, we cannot use the extensions approach like we do on Android.
Which particular model of Arduino are you using? One challenge here is that Apple has restricted access somewhat to what I would call "classic" Bluetooth due to energy consumption concerns. They do a...
Removing all unused references from a project in Visual Studio projects
...esharper/webhelp/Refactorings__Remove_Unused_References.html
This feature does not correctly handle:
Dependency injected assemblies
Dynamically loaded assemblies (Assembly.LoadFile)
Native code assemblies loaded through interop
ActiveX controls (COM interop)
Other creative ways of loading assembl...
Getting Checkbox Value in ASP.NET MVC 4
...r" />
<input type="hidden" value="false" name="Remember" />
How does it work:
If checkbox remains unchecked, the form submits only the hidden value (false)
If checked, then the form submits two fields (false and true) and MVC sets
true for the model's bool property
<input id="Remem...
What is the purpose of XORing a register with itself? [duplicate]
xor eax, eax will always set eax to zero, right? So, why does MSVC++ sometimes put it in my executable's code? Is it more efficient that mov eax, 0 ?
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How do I skip a match when using Ctrl+D for multiple selections in Sublime Text 2?
...rl+D.
(for OS X: Cmd+K, Cmd+D)
Needs a bit of practice, but gets the job done!
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The difference between fork(), vfork(), exec() and clone()
...ry map and creates a new one, it was a needless expense. Nowadays, fork() doesn't copy the memory; it's simply set as "copy on write", so fork()+exec() is just as efficient as vfork()+exec().
clone() is the syscall used by fork(). with some parameters, it creates a new process, with others, it cre...
Accept server's self-signed ssl certificate in Java client
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Option 2
Disable Certificate Validation:
// Create a trust manager that does not validate certificate chains
TrustManager[] trustAllCerts = new TrustManager[] {
new X509TrustManager() {
public java.security.cert.X509Certificate[] getAcceptedIssuers() {
return new X5...
How do I automatically update a timestamp in PostgreSQL
...to automatically update the time stamp when a new row is inserted as I can do in MySQL using CURRENT_TIMESTAMP.
4 Answers
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Copy a variable's value into another
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It's important to understand what the = operator in JavaScript does and does not do.
The = operator does not make a copy of the data.
The = operator creates a new reference to the same data.
After you run your original code:
var a = $('#some_hidden_var').val(),
b = a;
a and b a...