大约有 2,700 项符合查询结果（耗时：0.0471秒） [XML]
How do ACID and database transactions work?
...
Vlad MihalceaVlad Mihalcea
87.5k2727 gold badges346346 silver badges704704 bronze badges
...
Passing a std::array of unknown size to a function
...
87
Is there a simple way to make this work, as one would with plain C-style arrays?
No. You r...
What does “static” mean in C?
...
dreamlaxdreamlax
87.6k2828 gold badges154154 silver badges202202 bronze badges
...
How to set child process' environment variable in Makefile
...
87
As MadScientist pointed out, you can export individual variables with:
export MY_VAR = foo # ...
How to convert a unix timestamp (seconds since epoch) to Ruby DateTime?
...stime=0.0, @cutime=0.0, @stime=0.009999999999999998, @utime=0.86, @total=0.87>
irb(main):020:0>
irb(main):021:0* Benchmark.measure do
irb(main):022:1* 100_000.times {
irb(main):023:2* int_times.each do |i|
irb(main):024:3* Time.at(i).to_datetime
irb(main):025:3> end
irb(main...
What is the instanceof operator in JavaScript?
...
87
The other answers here are correct, but they don't get into how instanceof actually works, whic...
Java Reflection Performance
...
87
Yes, it's slower.
But remember the damn #1 rule--PREMATURE OPTIMIZATION IS THE ROOT OF ALL EVI...
Difference between decimal, float and double in .NET?
...
87
The Decimal structure is strictly geared to financial calculations requiring accuracy, which ar...
In PHP what does it mean by a function being binary-safe?
...
ArtefactoArtefacto
87.4k1414 gold badges185185 silver badges211211 bronze badges
...
Get Image size WITHOUT loading image into memory
... data = input.read(25)
if (size >= 10) and data[:6] in ('GIF87a', 'GIF89a'):
# GIFs
w, h = struct.unpack("<HH", data[6:10])
width = int(w)
height = int(h)
elif ((size >= 24) and data.startswith('\211PNG\r\n\032\n')
...