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获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
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21
文件系统所在的存储介质的类型， 0xf0 表明其实可移动数据介质。
不
22-23
一个FAT 拷贝所占用的扇区数。在 FAT 32 文件系统中，这区域不用。
是
24-25
一个磁道的扇...
Rails ActionMailer - format sender and recipient name/email address
.... Here is a safe way:
require 'mail'
address = Mail::Address.new email # ex: "john@example.com"
address.display_name = name.dup # ex: "John Doe"
# Set the From or Reply-To header to the following:
address.format # returns "John Doe <john@example.com>"
...
Concurrent.futures vs Multiprocessing in Python 3
...ou use to get at those isn't a primary factor in bottom-line speed.
Edit: example
Here's the final code shown in the article you referenced, but I'm adding an import statement needed to make it work:
from concurrent.futures import ProcessPoolExecutor
def pool_factorizer_map(nums, nprocs):
# Let ...
How do I accomplish an if/else in mustache.js?
...s, else clauses, or for loops." Yeeeeaaaaaa....
– boxed
Nov 10 '15 at 13:25
7
@boxed, technicall...
Why isn't vector a STL container?
...
For space-optimization reasons, the C++ standard (as far back as C++98) explicitly calls out vector<bool> as a special standard container where each bool uses only one bit of space rather than one byte as a normal bool would (implementing a kind of "dynamic bitset"). In exchange for this opt...
How to prevent custom views from losing state across screen orientation changes
...implementing View#onSaveInstanceState and View#onRestoreInstanceState and extending the View.BaseSavedState class.
public class CustomView extends View {
private int stateToSave;
...
@Override
public Parcelable onSaveInstanceState() {
//begin boilerplate code that allows parent class...
How does MongoDB sort records when no sort order is specified?
...atural order) is an undefined implementation detail. Maintaining order is extra overhead for storage engines and MongoDB's API does not mandate predictability outside of an explicit sort() or the special case of fixed-sized capped collections which have associated usage restrictions. For typical wor...
How can I extract a good quality JPEG image from a video file with ffmpeg?
Currently I am using this command to extract the images:
2 Answers
2
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NSOperation vs Grand Central Dispatch
...very simply with NSOperationQueue that take a lot of work with pure GCD. (Examples: bandwidth-constrained queues that only run N operations at a time; establishing dependencies between operations. Both very simple with NSOperation, very difficult with GCD.) Apple's done the hard work of leveraging ...
Extract substring using regexp in plain bash
I'm trying to extract the time from a string using bash, and I'm having a hard time figuring it out.
4 Answers
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