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How do I empty an array in JavaScript?
...1
(this was my original answer to the question)
A = [];
This code will set the variable A to a new empty array. This is perfect if you don't have references to the original array A anywhere else because this actually creates a brand new (empty) array. You should be careful with this method becau...
BAT file: Open new cmd window and execute a command in there
... state to transmit you might consider generating a batch file at runtime:
set foo=Hello, World
set list_me=%userprofile%
set tmpdir=c:\windows\temp
set tmp=%tmpdir%\tmp.foo
del /q /f "%tmp%"
echo.echo %foo%>>"%tmp%"
echo.dir "%list_me%">>>"%tmp"
start cmd.exe "%tmp%"
del /q /f "...
How to use auto-layout to move other views when a view is hidden?
...yed in my cell and sometimes only two labels. What I am trying to do is to set constraints that way if I set UIView property to hidden or I will remove it from superview the two labels will move to the left. I tried to set UIView leading constraint to Superview (Cell content) for 10px and UILabels l...
SQL UPDATE SET one column to be equal to a value in a related table referenced by a different column
...
update q
set q.QuestionID = a.QuestionID
from QuestionTrackings q
inner join QuestionAnswers a
on q.AnswerID = a.AnswerID
where q.QuestionID is null -- and other conditions you might want
I recommend to check what the result set to ...
How does Facebook disable the browser's integrated Developer Tools?
...lse
});
var i = 0;
function showWarningAndThrow() {
if (!i) {
setTimeout(function () {
console.log("%cWarning message", "font: 2em sans-serif; color: yellow; background-color: red;");
}, 1);
i = 1;
}
throw "Console is disabled";
}
var l, n = {
...
Make var_dump look pretty
I have a simple $_GET[] query var set for showing testing data when pulling down queries from the DB.
13 Answers
...
How to list files in a directory in a C program?
...irectory, and although they are "directories" they have the dir->d_type set to DT_REG. Also, I dont seem to get all the files... Is there a more comprehensive "directory scanner" code somewhere? Maybe some poor-mans implementation of "ls" ? I need this on Mac - OS-X
– Motti ...
How to state in requirements.txt a direct github source
...able” packages syntax can be used in requirements.txt to import packages from a variety of VCS (git, hg, bzr, svn):
-e git://github.com/mozilla/elasticutils.git#egg=elasticutils
Also, it is possible to point to particular commit:
-e git://github.com/mozilla/elasticutils.git@000b14389171a9f0d7d...
How to pass optional arguments to a method in C++?
...ll myfunc in both ways and both are valid
myfunc(10); // Mode will be set to default 0
myfunc(10, 1); // Mode will be set to 1
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What's the difference between a continuation and a callback?
...on add(x, y, cont) {
cont.async(x + y);
}
function async() {
setTimeout.bind(null, this, 0).apply(null, arguments);
}
The second problem is usually solved using a function called call-with-current-continuation which is often abbreviated as callcc. Unfortunately callcc can't be ...