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JS - get image width and height from the base64 code
...us use just wrap it into a promise like this:
function getImageDimensions(file) {
return new Promise (function (resolved, rejected) {
var i = new Image()
i.onload = function(){
resolved({w: i.width, h: i.height})
};
i.src = file
})
}
then you can use await to get the dat...
How do I debug error ECONNRESET in Node.js?
...
A simple tcp server I had for serving the flash policy file was causing this. I can now catch the error using a handler:
# serving the flash policy file
net = require("net")
net.createServer((socket) =>
//just added
socket.on("error", (err) =>
console.log("Caught ...
What does “#pragma comment” mean?
...tive which indicates Visual C++ to leave a comment in the generated object file. The comment can then be read by the linker when it processes object files.
#pragma comment(lib, libname) tells the linker to add the 'libname' library to the list of library dependencies, as if you had added it in the ...
Java: Getting a substring from a string starting after a particular character
...
Another way is to use this.
String path = "/abc/def/ghfj.doc"
String fileName = StringUtils.substringAfterLast(path, "/");
If you pass null to this method it will return null. If there is no match with separator it will return empty string.
...
Mysql ibdata 丢失或损坏如何通过frm&ibd 恢复数据 - 更多技术 - 清泛网 - ...
...意思，这个方法不能恢复你的数据。my.ini的设置为 innodb_file_per_table = 1。
参考 http://blog.chinaunix.net/uid-24111901-id-2627876.html
1、找回表结构，如果表结构没有丢失直接到下一步
a、先创建一个数据库，这个数据库必须是没有表和...
git revert back to certain commit [duplicate]
how do i revert all my files on my local copy back to a certain commit?
3 Answers
3
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ros 基本调试 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...件
在r43333及以后版本，可以在启动菜单中选择ReactOS(Log file)。这样调试信息就会被写入到名为debug.log的文件中去
这种方法有一定局限性，那就是致命的系统错误信息不会被写入到文件中去。
将调试文本输出到屏幕
将freeldr.ini...
How is “mvn clean install” different from “mvn install”?
...g the install phase for each module.
What this does is clear any compiled files you have, making sure that you're really compiling each module from scratch.
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How to go back (ctrl+z) in vi/vim
.... You can map the Ctrl+Z keys.
This can be achieved by editing the .vimrc file. Add the following lines in the '.vimrc` file.
nnoremap <c-z> :u<CR> " Avoid using this**
inoremap <c-z> <c-o>:u<CR>
This may not the a preferred way, but can be used.
** Ctrl+Z is ...
Is recursion ever faster than looping?
...at you are reading are a RDS, a JSON expression is a RDS, the hierarchical file system in your computer is a RDS, i.e: you have a root directory, containing files and directories, every directory containing files and directories, every one of those directories containing files and directories...
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