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Why can't C++ be parsed with a LR(1) parser?
...ing
(int(x)), (y), (new int));
(a comma-separated expression).
The two token sequences have the same initial subsequence but different parse trees, which depend on the last element. There can be arbitrarily many tokens before the disambiguating one.
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How to redirect the output of a PowerShell to a file during its execution
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I take it you can modify MyScript.ps1. Then try to change it like so:
$(
Here is your current script
) *>&1 > output.txt
I just tried this with PowerShell 3. You can use all the redirect options as in Nathan Hartley's answer.
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How to check if a particular service is running on Ubuntu
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Maybe what you want is the ps command;
ps -ef
will show you all processes running. Then if you have an idea of what you're looking for use grep to filter;
ps -ef | grep postgres
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Is mongodb running?
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check with either:
ps -edaf | grep mongo | grep -v grep # "ps" flags may differ on your OS
or
/etc/init.d/mongodb status # for MongoDB version < 2.6
/etc/init.d/mongod status # for MongoDB version >= 2.6
or
ser...
Installing Ruby Gem in Windows
I'm new to ruby. I tried to install GEM on my PC by following the steps given in the site http://rubygems.org/pages/download .
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ANTLR: Is there a simple example?
...uce any error message, and the files ExpLexer.java, ExpParser.java and Exp.tokens should now be generated.
To see if it all works properly, create this test class:
import org.antlr.runtime.*;
public class ANTLRDemo {
public static void main(String[] args) throws Exception {
ANTLRStrin...
What's the difference between OpenID and OAuth?
...mited to the 'this is who I am' assertion, while OAuth provides an 'access token' that can be exchanged for any supported assertion via an API).
2. Features
Both protocols provide a way for a site to redirect a user somewhere else and come back with a verifiable assertion. OpenID provides an identit...
How to get a list of current open windows/process with Java?
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This is another approach to parse the the process list from the command "ps -e":
try {
String line;
Process p = Runtime.getRuntime().exec("ps -e");
BufferedReader input =
new BufferedReader(new InputStreamReader(p.getInputStream()));
while ((line = input.readLine()) !=...
Closing Database Connections in Java
...with them, something like that:
Connection conn = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
// Do stuff
...
} catch (SQLException ex) {
// Exception handling stuff
...
} finally {
if (rs != null) {
try {
rs.close();
} catch (SQLE...
Android 1.6: “android.view.WindowManager$BadTokenException: Unable to add window — token null is not
I'm trying to open a dialog window, but every time I try to open it it throws this exception:
16 Answers
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