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_DEBUG vs NDEBUG
Which preprocessor define should be used to specify debug sections of code?
6 Answers
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Android Preferences: How to load the default values when the user hasn't used the preferences-screen
...he readAgain argument to false means this will only set the default values if this method has never been called in the past so you don't need to worry about overriding the user's settings each time your Activity is created
Take a look into PreferenceManager.setDefaultValues in Android API for furthe...
How to enter quotes in a Java string?
...Henry's answer, I'm not quite 100% sure I understand what you are asking.
If it is about getting double quote marks added into a string, you can concatenate the double quotes into your string, for example:
String theFirst = "Java Programming";
String ROM = "\"" + theFirst + "\"";
Or, if you want...
Rails detect if request was AJAX
In my action I wish to only respond with processing if it was called from an AJAX request. How do I check?
5 Answers
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How to check if BigDecimal variable == 0 in java?
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Use compareTo(BigDecimal.ZERO) instead of equals():
if (price.compareTo(BigDecimal.ZERO) == 0) // see below
Comparing with the BigDecimal constant BigDecimal.ZERO avoids having to construct a new BigDecimal(0) every execution.
FYI, BigDecimal also has constants BigDecimal.O...
Best way to include CSS? Why use @import?
... can prevent stylesheets from being downloaded concurrently. For instance, if stylesheet A contains the text:
@import url("stylesheetB.css");
then the download of the second stylesheet may not start until the first stylesheet has been downloaded. If, on the other hand, both stylesheets are refere...
Regex doesn't work in String.matches()
...tches ALL the input. Unfortunately, other languages have followed suit :(
If you want to see if the regex matches an input text, use a Pattern, a Matcher and the .find() method of the matcher:
Pattern p = Pattern.compile("[a-z]");
Matcher m = p.matcher(inputstring);
if (m.find())
// match
If...
Load multiple packages at once
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Several permutations of your proposed functions do work -- but only if you specify the character.only argument to be TRUE. Quick example:
lapply(x, require, character.only = TRUE)
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How to insert text into the textarea at the current cursor position?
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function insertAtCursor(myField, myValue) {
//IE support
if (document.selection) {
myField.focus();
sel = document.selection.createRange();
sel.text = myValue;
}
//MOZILLA and others
else if (myField.selectionStart || myField.selectionStart == '0...
Check if a JavaScript string is a URL
Is there a way in JavaScript to check if a string is a URL?
32 Answers
32
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