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Android; Check if file exists without creating a new one
...unk of code does not create a new one, it only checks if its already there and nothing else.
File file = new File(filePath);
if(file.exists())
//Do something
else
// Do something else.
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Using HeapDumpOnOutOfMemoryError parameter for heap dump for JBoss
...imilar to "Unable to create /tmp/java_pidpid.hprof: File exists" in your standard out. Be sure to move your dump file out of the dump path to clear the way for any future dump files; and make use of the <pid> placeholder in the file name to increase entropy in the file name.
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Two statements next to curly brace in an equation
How can I write an equation with one curly brace ( { ), and on the right-hand side next to the curly, two statements in two different lines?
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How do I make UITableViewCell's ImageView a fixed size even when the image is smaller
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Here's how i did it. This technique takes care of moving the text and detail text labels appropriately to the left:
@interface SizableImageCell : UITableViewCell {}
@end
@implementation SizableImageCell
- (void)layoutSubviews {
[super layoutSubviews];
float desiredWidth = 80;
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Kotlin Ternary Conditional Operator
... code is equivalent:
if (a) b else c
The distinction between expression and statement is important here. In Java/C#/JavaScript, if forms a statement, meaning that it does not resolve to a value. More concretely, you can't assign it to a variable.
// Valid Kotlin, but invalid Java/C#/JavaScript
v...
jQuery append() - return appended elements
...ngs around by first creating newHtml with jQuery(html [, ownerDocument ]), and then using appendTo(target) (note the "To" bit) to add that it to the end of #mydiv.
Because you now start with $(newHtml) the end result of appendTo('#myDiv') is that new bit of html, and the .effects(...) call will be...
Any shortcut to initialize all array elements to zero?
...ger[0]);
Would give arr the value:
[42, 42, 42]
(though it's Integer, and not int, if you need the primitive type you could defer to the Apache Commons ArrayUtils.toPrimitive() routine:
int [] primarr = ArrayUtils.toPrimitive(arr);
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git: fatal: Could not read from remote repository
...key had been "removed". so ssh-add ~/.ssh/theKeyInQuestion got me back up and running with this repo, didnt know the key removed, or what "removed" even means but at least I was able to get authenticated again. SSH is a total mystery to me even after months of dealing with authentication issues. s...
How do I send a POST request as a JSON?
...xpecting the POST request to be json, then you would need to add a header, and also serialize the data for your request...
Python 2.x
import json
import urllib2
data = {
'ids': [12, 3, 4, 5, 6]
}
req = urllib2.Request('http://example.com/api/posts/create')
req.add_header('Content-Type', ...
Deleting DataFrame row in Pandas based on column value
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If I'm understanding correctly, it should be as simple as:
df = df[df.line_race != 0]
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