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Check if a div exists with jquery [duplicate]
... though I can't think of how this would come up, that you need to run thousands of select queries over and over). It's just much more verbose, over the course of a lot of javascript that really adds up to more space and less readability.
– Jamie Treworgy
Aug 1 ...
Will console.log reduce JavaScript execution performance?
... of the best approaches is to wrap the console.log in one of your methods, and where you can check for conditions and execute it. In a production build, you can avoid having these functions. This Stack Overflow question talks in details about how to do the same using the Closure compiler.
So, to a...
What is the size of ActionBar in pixels?
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To retrieve the height of the ActionBar in XML, just use
?android:attr/actionBarSize
or if you're an ActionBarSherlock or AppCompat user, use this
?attr/actionBarSize
If you need this value at runtime, use this
final TypedArray styledAttributes = getContext().getTheme().obtain...
Can gcc output C code after preprocessing?
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If your compiler commands already has a parameter like -o something.o you may also want to change it to -o something.i. Otherwise the preprocessed output will be in the .o file.
– Tor Klingberg
Mar 19 '15 at...
Rethrowing exceptions in Java without losing the stack trace
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Hi, InterruptedException e gives an unhandled Exception message when I add the throw e line. Not so if I replace it with the broader Exception e. How should this be done properly?
– James P.
Oct 31 '11 at 2:07
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How can I round down a number in Javascript?
... by JavaScript - can be emulated by using Math.ceil() for negative numbers and Math.floor() for positive numbers.
+3.5 => +3.0 using Math.floor()
-3.5 => -3.0 using Math.ceil()
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impro...
convert a list of objects from one type to another using lambda expression
I have a foreach loop reading a list of objects of one type and producing a list of objects of a different type. I was told that a lambda expression can achieve the same result.
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Determine whether JSON is a JSONObject or JSONArray
...u have an array
tokenizer is able to return more types: http://developer.android.com/reference/org/json/JSONTokener.html#nextValue()
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Does a foreign key automatically create an index?
...se through a FK-relationship, you'll often need to lookup a relating table and extract certain rows based on a single value or a range of values.
So it makes good sense to index any columns involved in a FK, but a FK per se is not an index.
Check out Kimberly Tripp's excellent article "When did SQ...
Android OnClickListener - identify a button
...b1);
b2 = (Button) findViewById(R.id.b2);
b1.setOnClickListener(myhandler1);
b2.setOnClickListener(myhandler2);
...
}
View.OnClickListener myhandler1 = new View.OnClickListener() {
public void onClick(View v) {
// it was the 1st button
}
};
View.OnClickListener ...