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Best database field type for a URL
...oc/refman/5.0/en/char.html
Values in VARCHAR columns are variable-length strings. The length can be specified as a value from 0 to 255 before MySQL 5.0.3, and 0 to 65,535 in 5.0.3 and later versions. The effective maximum length of a VARCHAR in MySQL 5.0.3 and later is subject to the maximum row s...
How to find out line-endings in a text file?
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Unfortunately, I don't think vi can show those specific characters. You can try od -c <filename> which I believe will display \n or \r\n.
– Ryan Berger
Aug 25 '10 at 22:51
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Weird Integer boxing in Java
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public class Scratch
{
public static void main(String[] args)
{
Integer a = 1000, b = 1000; //1
System.out.println(a == b);
Integer c = 100, d = 100; //2
System.out.println(c == d);
}
}
Output:
false
true
Yep the first output...
Building a notification system [closed]
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notification_object.object identifies change type, like a string "friendship" The actual reference to changed object with its extra data that I talk about is in notification_change.notificationObjectID
– Artjom Kurapov
Apr 29 '13 at 7:35
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round up to 2 decimal places in java? [duplicate]
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String roundOffTo2DecPlaces(float val)
{
return String.format("%.2f", val);
}
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How do I replace all line breaks in a string with elements?
...ional note: str.replace("\n", '<br />') (first argument is a regular string) will replace only first occurrence.
– Serge S.
Apr 15 '13 at 20:49
19
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How to replace an entire line in a text file by line number
... are words from the line).
So, if the current line number is 4, print the string "different" but otherwise print the line unchanged.
In AWK, program code enclosed in { } runs once on each input record.
You need to quote the AWK program in single-quotes to keep the shell from trying to interpret t...
Remove last character of a StringBuilder?
When you have to loop through a collection and make a string of each data separated by a delimiter, you always end up with an extra delimiter at the end, e.g.
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Programmatically update widget from activity/service/receiver
...t.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE);
// Use an array and EXTRA_APPWIDGET_IDS instead of AppWidgetManager.EXTRA_APPWIDGET_ID,
// since it seems the onUpdate() is only fired on that:
int[] ids = AppWidgetManager.getInstance(getApplication())
.getAppWidgetIds(new ComponentN...
Single vs double quotes in JSON
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JSON syntax is not Python syntax. JSON requires double quotes for its strings.
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