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update util.once to add a handler for multiple callbacks

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ansuz
2019-09-09 16:30:58 +02:00
parent 1d5534b593
commit 56ec91ff27
1 changed files with 5 additions and 4 deletions
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9
www/common/common-util.js
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@@ -222,13 +222,14 @@
return Math.floor(Math.random() * Number.MAX_SAFE_INTEGER); return Math.floor(Math.random() * Number.MAX_SAFE_INTEGER);
}; };
Util.noop = function () {};
/* for wrapping async functions such that they can only be called once */ /* for wrapping async functions such that they can only be called once */
Util.once = function (f) { Util.once = function (f, g) {
var called;
return function () { return function () {
if (called) { return; } if (!f) { return; }
called = true;
f.apply(this, Array.prototype.slice.call(arguments)); f.apply(this, Array.prototype.slice.call(arguments));
f = g;
}; };
}; };