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Save image from URL by paperclip
...lightly better than open(url). Because with open(url) you're going to get "stringio.txt" as the filename. With the above you're going to get a proper name of the file based on the URL. i.e.
self.picture = URI.parse("http://something.com/blah/avatar.png")
self.picture_file_name # => "avatar.p...
Postgresql: Scripting psql execution with password
... the following format:
hostname:port:database:username:password Do not add string quotes around your field values. You can also use * as a wildcard for your port/database fields.
You must chmod 0600 ~/.pgpass in order for it to not be silently ignored by psql.
Create an alias in your bash profile th...
How to make good reproducible pandas examples
...search (search the docs, search StackOverflow), give a summary:
The docstring for sum simply states "Compute sum of group values"
The groupby docs don't give any examples for this.
Aside: the answer here is to use df.groupby('A', as_index=False).sum().
if it's relevant that you have Times...
Draw a perfect circle from user's touch
...;
g.drawOval(cX, cY, cD, cD);
}else{
g.drawString("Uknown",30,50);
}
}
private Type getType(int dx, int dy) {
Type result = Type.UNDEFINED;
if (dx > 0 && dy < 0) {
result = Type.RIGHT_DOWN;
} else if...
How to delete a file via PHP?
.../github.com/luyadev/luya/blob/master/core/helpers/FileHelper.php
* @param string $filename The file path to the file to delete.
* @return boolean Whether the file has been removed or not.
*/
function unlinkFile ( $filename ) {
// try to force symlinks
if ( is_link ($filename) ) {
...
Set the value of an input field
... Never set non-text values to such fields. If you read back you will read string (!) in some browsers )
– socketpair
Apr 4 '14 at 14:21
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How to remove an item from an array in AngularJS scope?
...tion above - being - delete({{$index}}) with the {{ }} otherwise I got the string $index - BUT I have something wrong because it never calls that method. It does when I remove any mention of the index like delete() but that doesn't really help.
– mikemil
Oct 2...
Is there any publicly accessible JSON data source to test with real world data? [closed]
... sample
HTML
<div id="images">
</div>
Javascript
// Querystring, "tags" search term, comma delimited
var query = "http://www.flickr.com/services/feeds/photos_public.gne?tags=soccer&format=json&jsoncallback=?";
// This function is called once the call is satisfied
// http:...
Pick a random value from an enum?
... new RandomEnum<Season>(Season.class);
public static void main(String[] args) {
System.out.println(r.random());
}
private static class RandomEnum<E extends Enum<E>> {
private static final Random RND = new Random();
private final E[] values;
...
How to read if a checkbox is checked in PHP?
... this in pure simple php. but have to note that the value of a checkbox is string on when it is activated an a inexisting value if it is checked.
– Elvis Technologies
Nov 24 '18 at 5:07
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