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What is the difference between sigaction and signal?
...uld use sigaction() but if I was writing from scratch, which should I choose?
9 Answers
...
Is non-blocking I/O really faster than multi-threaded blocking I/O? How?
...O and not multiple threads (so reducing thread switching).
Let's look at possible implementations of a network server program that shall handle 1000 clients connected in parallel:
One thread per connection (can be blocking I/O, but can also be non-blocking I/O).
Each thread requires memory resour...
MaterialDialog 对话框增强扩展 · App Inventor 2 中文网
...tonText,cancelableOnTouchOutside,isIndeterminateProgress,rgbColor)
创建一个包含标题、消息文本和最多三个按钮的标准对话框。按钮点击后触发 OnButtonClick 事件。
dialogId：对话框的唯一标识符。
title：对话框标题。
message：...
Viewing full version tree in git
... the part that is reachable from the currently checked out version. Is it possible?
5 Answers
...
How to show git log history for a sub directory of a git repo?
...anges for src/nvfs
$ git log --oneline -- src/nvfs
d6f6b3b Changes for Mac OS X
803fcc3 Initial Commit
# Show all changes (one additional commit besides in src/nvfs).
$ git log --oneline
d6f6b3b Changes for Mac OS X
96cbb79 gitignore
803fcc3 Initial Commit
...
How to copy text from Emacs to another application on Linux
... to M-w).
A system copy is what you typically get from pressing C-c (or choosing "Edit->Copy" in a application window).
An X copy is "physically" highlighting text with the mouse cursor.
An Emacs paste is the command yank (usually bound to C-y).
A system paste is what you typically get from press...
server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
...
TLDR:
hostname=XXX
port=443
trust_cert_file_location=`curl-config --ca`
sudo bash -c "echo -n | openssl s_client -showcerts -connect $hostname:$port -servername $hostname \
2>/dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END...
How to grep and replace
...
On OS X 10.10 Terminal, a proper extension string to parameter -i is required. For example, find /path/to/files -type f -exec sed -i "" "s/oldstring/new string/g" {} \; Anyway, providing empty string still creates a backup file ...
Determining the last changelist synced to in Perforce
...
I recommend the opposite for automatic build systems: you should first get the latest changelist from the server using:
p4 changes -s submitted -m1
then sync to that change and record it in the revision info. The reason is as follows. Alth...
What does [STAThread] do?
...ents. Although core Windows Forms does not use COM, many components of the OS such as system dialogs do use this technology.
MSDN explains the reason in slightly more detail:
STAThreadAttribute indicates that the
COM threading model for the
application is single-threaded
apartment. This a...