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Difference between float and decimal data type
...most environments is a binary floating-point type. It can accurately store base-2 values (to a certain point), but cannot accurately store many base-10 (decimal) values. Floats are most appropriate for scientific calculations. They're not appropriate for most business-oriented math, and inappropriat...
What is the theoretical maximum number of open TCP connections that a modern Linux box can have
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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What is size_t in C?
... the return type
of size_t. Further, the most
frequently used compiler-based
operator sizeof should evaluate to a
constant value that is compatible with
size_t.
As an implication, size_t is a type guaranteed to hold any array index.
...
【拍照图片处理】Attempt to invoke virtual method 'boolean android.grap...
...erence
图片大致的处理流程是：先TaifunImage压缩尺寸，在Base64化，调在线api进行识别。
通过调试发现问题是出现在 图片的Resize/Base64化的步骤上，看报错是图片对象为空导致的。
参考了一些英文资料，大致可能原因有：图...
dd: How to calculate optimal blocksize? [closed]
...enough block size lets dd do a good job, and the differences between, say, 64 KiB and 1 MiB are minor, compared to 4 KiB versus 64 KiB. (Though, admittedly, it's been a while since I did that. I use a mebibyte by default now, or just let dd pick the size.)
...
/usr/lib64/gcc/ ... /bin/ld: cannot find -lxxx 踩坑记录 - C/C++ - 清泛网 - 专注C/C++及内核技术
/usr/lib64/gcc/ ... /bin/ld: cannot find -lxxx 踩坑记录编译一个模块时依赖xxx模块，在确认依赖路径及依赖xxx so文件名均正确的前提下，编译仍然报错： usr lib64 gcc bin ld: cannot find -lxxx最后才发现，xxx目录生成的目 编译一个模块时依...
尝试加载 Oracle 客户端库时引发 BadImageFormatException。如果在安装 32 ...
...atException。如果在安装 32 位 Oracle 客户端组件的情况下以 64 位模式运行，将出现此问题。尝试加载 Oracle 客户端库时引发 BadImageFormatException。如果在安装 32 位 Oracle 客户端组件的情况下以 64 位模式运行，将出...“尝试加载 Oracle ...
Debian/Linux下安装OpenJDK8 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...T090326Z/pool/updates/main/o/openjdk-8/openjdk-8-jdk_8u322-b06-1~deb9u1_amd64.deb
wget http://snapshot.debian.org/archive/debian-security/20220210T090326Z/pool/updates/main/o/openjdk-8/openjdk-8-jdk-headless_8u322-b06-1~deb9u1_amd64.deb
wget http://snapshot.debian.org/archive/debian-security/20220...
apt-get for Cygwin?
...sing Cygwin’s setup.exe from Windows command line. Example:
cd C:\cygwin64
setup-x86_64 -q -P wget,tar,qawk,bzip2,subversion,vim
For a more convenient installer, you may want to use the
apt-cyg package manager. Its syntax
similar to apt-get, which is a plus. For this, follow the above steps and...
Read file data without saving it in Flask
...
image = request.files['photo']
image_string = base64.b64encode(image.read())
image_string = image_string.decode('utf-8')
#use this to remove b'...' to get raw string
return render_template('handleUpload.html',filestring = image_string)...