大约有 36,030 项符合查询结果（耗时：0.0788秒） [XML]
STL or Qt containers?
...which is extremely useful when it comes to using Qt's foreach macro
(which does a copy) and when using meta-types or signals and slots.
can use STL-style iterators or Java-style iterators
are streamable with QDataStream
are used extensively in Qt's API
have a stable implementation across operating s...
Should I instantiate instance variables on declaration or in the constructor?
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@Bozho Do object initializations go into the constructor before or after the initialization block?
– Cruncher
Sep 3 '13 at 20:34
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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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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...
How do I sort strings alphabetically while accounting for value when a string is numeric?
...le.OrderBy will let you specify any comparer you like.
This is one way to do that:
void Main()
{
string[] things = new string[] { "paul", "bob", "lauren", "007", "90", "101"};
foreach (var thing in things.OrderBy(x => x, new SemiNumericComparer()))
{
Console.WriteLine(t...
C#: how to get first char of a string?
Can the first char of a string be retrieved by doing the following?
13 Answers
13
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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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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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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...