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static files with express.js
...ic'));
});
server.listen(3000);
The trick is leaving this line as last fallback
server.use(express.static(__dirname + '/public'));
As for documentation, since Express uses connect middleware, I found it easier to just look at the connect source code directly.
For example this line shows th...
Expert R users, what's in your .Rprofile? [closed]
...tryCatch(
{options(
width = as.integer(Sys.getenv("COLUMNS")))},
error = function(err) {
write("Can't get your terminal width. Put ``export COLUMNS'' in your \
.bashrc. Or something. Setting width to 120 chars",
stderr());
options(width=120)}
)
This way R wi...
Changing the Git remote 'push to' default
...
Just tried git branch --set-upstream-to myfork and got an error: >error: unknown option `set-upstream-to' I'm running git 1.7.9
– alonisser
Sep 15 '13 at 21:17
...
String literals: Where do they go?
...return const reference to a string literal? Why this program shows runtime error see ideone.com/FTs1Ig
– Destructor
Nov 21 '15 at 14:48
...
PHP + MySQL transactions examples
... rollback the transaction
$db->rollback();
throw $e; // but the error must be handled anyway
}
Note that, with this idea, if a query fails, an Exception must be thrown:
PDO can do that, depending on how you configure it
See PDO::setAttribute
and PDO::ATTR_ERRMODE and PDO::ERRMODE_EXCE...
What's the difference between a Future and a Promise?
...;
})
...
.then(function(result){
console.log(result);
})
.catch(function(error){
console.log(error);
})
which makes asynchronous computation to look like synchronous:
try {
op1Result = syncOp1();
// do something
op1Result = syncOp2();
// do something more
op3Result = syncOp3();
//...
ComponentGroup 组件组扩展：监控内容变化和批量启用禁用组件 · App Inventor 2 中文网
...Box1
当 ComponentGroup1.AfterContentTouched 时
设置 Label1.Text 为 连接("组件已修改: ", 获取 组件名称)
保存前检查是否有修改
当 SaveButton.Click 时
如果 ComponentGroup1.ContentChanged 那么
调用 保存数据
否则
调用 Not...
What are file descriptors, explained in simple terms?
... descriptors 0, 1, and 2 are standard input, standard output, and standard error for each running process. A successful initial call to open() will give you file descriptor 3, even if another running process happens to have a file descriptor 3. See the POSIX definition of open(): "The open() functio...
What does the `forall` keyword in Haskell/GHC do?
... val = maybe onNothin onJust mval
This code doesn't compile (syntax error) in plain Haskell 98. It requires an extension to support the forall keyword.
Basically, there are 3 different common uses for the forall keyword (or at least so it seems), and each has its own Haskell extension: Scope...
Object.watch() for all browsers?
...
if (!Number.isInteger(value)) {
throw new TypeError('The age is not an integer');
}
if (value > 200) {
throw new RangeError('The age seems invalid');
}
}
// The default behavior to store the value
...