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node.js execute system command synchronously
...re("node-ffi");
var libc = new FFI.Library(null, {
"system": ["int32", ["string"]]
});
var run = libc.system;
run("echo $USER");
[EDIT Jun 2012: How to get STDOUT]
var lib = ffi.Library(null, {
// FILE* popen(char* cmd, char* mode);
popen: ['pointer', ['string', 'string']],
// voi...
Common MySQL fields and their appropriate data types
... |
| salt | CHAR(x) | randomly generated string, usually of
fixed length (x)
| digest (md5) | CHAR(32) | |
| phone number | VAR...
Use String.split() with multiple delimiters
I need to split a string base on delimiter - and . . Below are my desired output.
13 Answers
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How to convert int to char with leading zeros?
..."Len()" function works on ints, so there's no need to convert the int to a string before calling the len() function.
Lastly, you are not taking into account the case where the size of your int > the total number of digits you want it padded to (@intLen).
Therefore, a more concise / correct solu...
Converting bool to text in C++
...s is a dumb question, but is there any way to convert a boolean value to a string such that 1 turns to "true" and 0 turns to "false"? I could just use an if statement, but it would be nice to know if there is a way to do that with the language or standard libraries. Plus, I'm a pedant. :)
...
How can I find out if I have Xcode commandline tools installed?
...ow you get it from the store, and with this new mechanism it can't install extra things outside of the Xcode.app, so you have to manually do it yourself, by:
xcode-select --install
On Xcode 4.x you can check to see if they are installed from within the Xcode
UI:
On Xcode 5.x it is now here:
...
How do pointer to pointers work in C?
...--+----+----+----+----+
What you can see here, is that at address 63 the string "hello" starts. So in this case, if this is the only occurrence of "hello" in memory then,
const char *c = "hello";
... defines c to be a pointer to the (read-only) string "hello", and thus contains the value 63. c ...
How to connect android emulator to the internet
...
I've created a simple script to do just that, you can check it out at: gist.github.com/brotoo25/246d8767982ed74ce98ed165ea099a5d
– Brotoo25
Apr 26 '19 at 23:24
...
深入浅出计算机字符集编码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...台采用的是JAVA编程，问题便很容易解决直接用destStr = new String(sourceStr.getByte(“UTF-8”), “EUC-JP”)就可以进行编码的转换，不过C++就没那么幸运了，除非按照一定的逻辑自行实现一套编码转换的方法，当然从各方面限制来看是不...
What is the difference between const and readonly in C#?
...nforce this. The runtime also happens not to enforce that you don't change string.Empty to "Hello, world!", but I still wouldn't claim that this makes string.Empty modifiable, or that code shouldn't assume that string.Empty will always be a zero-length string.
– user743382
...