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Looking for a clear definition of what a “tokenizer”, “parser” and...
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A tokenizer breaks a stream of text into tokens, usually by looking for whitespace (tabs, spaces, new lines).
A lexer is basically a tokenizer, but it usually attaches extra context to the tokens -- this token is a number, that token is a string literal, this other token is an equ...
How does Duff's device work?
...'s the Wikipedia example with some notations.
Let's say you're copying 20 bytes. The flow control of the program for the first pass is:
int count; // Set to 20
{
int n = (count + 7) / 8; // n is now 3. (The "while" is going
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git shallow clone (clone --depth) misses remote branches
After cloning a remote repository it does not show any remote branch by -a option. What could be the problem? How to debug it? In this snippet two of the remote branches are not shown:
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How to subtract X days from a date using Java calendar?
... subtract 5 days from the current time of the calendar, you can achieve it by calling:
Calendar calendar = Calendar.getInstance(); // this would default to now
calendar.add(Calendar.DAY_OF_MONTH, -5).
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dplyr: “Error in n(): function should not be called directly”
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As mentioned by the previous answer, you may have a conflict between plyr and dplyr. You can to run this command to unload the plyr package.
detach("package:plyr", unload=TRUE)
Then you can continue as expected.
library(dplyr)
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How to reference constants in EL?
...that your web.xml is declared conform the latest servlet version supported by the server. Thus with a web.xml which is declared conform Servlet 2.5 or older, none of the Servlet 3.0+ features will work.
Also note that this facility is only available in JSP and not in Facelets. In case of JSF+Facele...
How do I access the $scope variable in browser's console using AngularJS?
...irefox, $0 is a reference to the selected DOM node in the elements tab, so by doing this you get the selected DOM node scope printed out in the console.
You can also target the scope by element ID, like so:
angular.element(document.getElementById('yourElementId')).scope()
Addons/Extensions
Ther...
Override configured user for a single git commit
...e .git/config file of the local repo you cloned from git. This can be done by running git config (no --global or --system to make it "local to the repo") or by editing the .git/config (it's the same syntax as ~/.gitconfig
s...
How can I override inline styles with external CSS?
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To only way to override inline style is by using !important keyword beside the CSS rule. Following is an example of it.
div {
color: blue !important;
/* Adding !important will give this rule more precedence over inline style */
}
<div...
How do I get out of a screen without typing 'exit'?
...ou can generally access a shorter & pretty helpful version of the docs by --help option, command_name --help, this case screen --help.
– Ashish
Sep 13 '14 at 6:42
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