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How does this JavaScript/jQuery syntax work: (function( window, undefined ) { })(window)?
...variable name. When it's not found, JavaScript goes through the next scope etc. until it filters through the global variables. So if the window variable is made local, JavaScript can look it up quicker.
Further information: Speed Up Your JavaScript - Nicholas C. Zakas
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Grep only the first match and stop
...u can pipe grep result to head in conjunction with stdbuf.
Note, that in order to ensure stopping after Nth match, you need to using stdbuf to make sure grep don't buffer its output:
stdbuf -oL grep -rl 'pattern' * | head -n1
stdbuf -oL grep -o -a -m 1 -h -r "Pulsanti Operietur" /path/to/dir | he...
Best Practice: Initialize JUnit class fields in setUp() or at declaration?
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This initialization order is only true in JUnit 3, where it is an important caution. In JUnit 4 test instances are created lazily, so initializing in the declaration or in a setup method both happen at test time. Also for one-time setup, one can...
How to use R's ellipsis feature when writing your own function?
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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How do I get the coordinates of a mouse click on a canvas element?
...s a simplification of @Aldekein´s solution but without jQuery.
function getCursorPosition(canvas, event) {
const rect = canvas.getBoundingClientRect()
const x = event.clientX - rect.left
const y = event.clientY - rect.top
console.log("x: " + x + " y: " + y)
}
const canvas = docume...
Soft keyboard open and close listener in an activity in Android
...savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.test_activity);
attachKeyboardListeners();
}
@Override
protected void onShowKeyboard(int keyboardHeight) {
// do things when keyboard is shown
bottomContainer.setVi...
How to detect if a property exists on an ExpandoObject?
...ject will throw if you check for null on a property that doesn't exist. In order to get MVC ViewBag's gentler functionality out of your dynamic objects, you'll need to use an implementation of dynamic that doesn't throw.
You could simply use the exact implementation in MVC ViewBag:
. . .
public ov...
Youtube iframe wmode issue
...yerVars also sends that parameter to the Flash object, which has its own z-order problem. See here: groups.google.com/forum/?fromgroups#!topic/youtube-api-gdata/… I'll edit your answer accordingly.
– Dylan McCall
Mar 21 '12 at 4:18
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Python Pandas merge only certain columns
...aFrame df1 with columns x, y, z, and df2 with columns x, a ,b, c, d, e, f, etc.
5 Answers
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Need for predictable random generator
... put 1 critical and 4 non-critical hits in a bag. Then you randomize their order in the bag and pick them out one at a time. When the bag is empty, you fill it again with the same values and randomize it. That way you will get in average 1 critical hit per 5 hits, and at most 2 critical and 8 non-cr...