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Rails 3 check if attribute changed
Need to check if a block of attributes has changed before update in Rails 3.
5 Answers
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Need for predictable random generator
...s, 1 out of 5 hits should be critical. The problem is I got very bad real life results — sometimes players get 3 crits in 5 hits, sometimes none in 15 hits. Battles are rather short (3-10 hits) so it's important to get good random distribution.
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Change Placeholder Text using jQuery
...pe=textarea], input[type=password], textarea").each(function(ev)
{
if(!$(this).val()) {
$(this).attr("placeholder", "Type your answer here");
}
});
});
Copy and paste this code in your js file, this will change all placeholder text from whole site.
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How to check if a variable is null or empty string or all whitespace in JavaScript?
I need to check to see if a variable is null or has all empty spaces or is just blank ("").
12 Answers
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How to stop a JavaScript for loop?
...nd assigning something to `remData`... */
remIndex = -1; // Set a default if we don't find it
for (i = 0; i < remSize.length; i++) {
// I'm looking for the index i, when the condition is true
if (remSize[i].size === remData.size) {
remIndex = i;
break; /...
How to print matched regex pattern using awk?
...lt is called a record, denoted by $0. At least read up the documentation.
If you only want to get print out the matched word.
awk '{for(i=1;i<=NF;i++){ if($i=="yyy"){print $i} } }' file
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How do you select a particular option in a SELECT element in jQuery?
If you know the Index, Value or Text. also if you don't have an ID for a direct reference.
21 Answers
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Check if event exists on element [duplicate]
Is there a way to check if an event exists in jQuery? I’m working on a plugin that uses custom namespaced events, and would like to be able to check if the event is binded to an element or not.
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Array include any value from another array?
What's the most efficient way to test if an array contains any element from a second array?
5 Answers
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Sort objects in ArrayList by date?
...ou don't want to change your model, like when you want to sort on several different properties. In that case, you can create comparator on the fly:
Collections.sort(myList, new Comparator<MyObject>() {
public int compare(MyObject o1, MyObject o2) {
return o1.getDateTime().compareTo(o2...