大约有 40,000 项符合查询结果（耗时：0.0458秒） [XML]
Why is exception handling bad?
...each individual method to get it right and roll back when that happens, or order your operations so throws don't effect object state. If you get it wrong (and it's easy to make this kind of mistake), then the caller ends up seeing your intermediate values.
Methods like RAII, which C++ programmers ...
Generate a heatmap in MatPlotLib using a scatter data set
...y (e.g., square bins don't,
e.g., the distance from a point on a square's border to a point
inside that square is not everywhere equal) and
hexagon is the highest n-polygon that gives regular plane
tessellation (i.e., you can safely re-model your kitchen floor with hexagonal-shaped tiles because you...
What are the use cases of Graph-based Databases (http://neo4j.org/)? [closed]
...hs). I've been playing around with neo4j, and my lookup times are several orders of magnitude faster when I need this kind of lookup.
Second, to the point that graph databases are outdated. Um...no. Early on, as people were trying to figure out how to store and lookup data efficiently, they crea...
What's better to use in PHP, $array[] = $value or array_push($array, $value)?
...ack naming convention and find it easy to remember, as it goes in the same order as the phrase: "like finding a needle (1) in a haystack (2)"
– rybo111
Aug 1 '14 at 9:39
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What are some uses of template template parameters?
...drei Alexandrescu:
He uses a classes with template template parameters in order to implement the policy pattern:
// Library code
template <template <class> class CreationPolicy>
class WidgetManager : public CreationPolicy<Widget>
{
...
};
He explains:
Typically, the host cla...
How do you keep user.config settings across different assembly versions in .net?
...called Upgrade which migrates all settings from the previous version.
In order to run the merge whenever you publish a new version of your application you can define a boolean flag in your settings file that defaults to true. Name it UpgradeRequired or something similar.
Then, at application sta...
PHP MySQL Google Chart JSON - Complete Example
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What is the difference between ${var}, “$var”, and “${var}” in the Bash shell?
...are variations on Bash Shell Expansions. Expansions happen in a particular order, and some have specific use cases.
Braces as Token Delimiters
The ${var} syntax is primarily used for delimiting ambiguous tokens. For example, consider the following:
$ var1=foo; var2=bar; var12=12
$ echo $var12
12
...
Load view from an external xib file in storyboard
...ther than the original class. It doesn't actually have to be a subclass in order for this to work, but making it a subclass is what allows IB to see any IBInspectable/IBOutlet properties.
This extra boilerplate might seem suboptimal—and in a sense it is, because ideally UIStoryboard would handle ...
C libcurl get output into a string
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