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Unioning two tables with different number of columns
...he use of * as column list specifier. This type of errors can be easily avoided by entering the column list explicitly:
select col_a, col_b, col_c from test1_1790
union all
select col_a, col_b, col_c from test2_1790;
A more frequent scenario for this error is when you inadvertently swap (or shift) ...
PatternSyntaxException: Illegal Repetition when using regex in Java
...e error message: "Illegal repetition".
You should escape them: "\\{\"user_id\" : [0-9]*\\}".
And since you seem to be trying to parse JSON, I suggest you have a look at Jackson.
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How to create function that returns nothing
...
Use RETURNS void like below:
CREATE FUNCTION stamp_user(id int, comment text) RETURNS void AS $$
#variable_conflict use_variable
DECLARE
curtime timestamp := now();
BEGIN
UPDATE users SET last_modified = curtim...
Understanding the Rails Authenticity Token
... authenticity_token, stores this token in the session, and places it in a hidden field in the form. When the user submits the form, Rails looks for the authenticity_token, compares it to the one stored in the session, and if they match the request is allowed to continue.
Why it happens
Since the a...
Use HTML5 to resize an image before upload
...at I ended up doing and it worked great.
First I moved the file input outside of the form so that it is not submitted:
<input name="imagefile[]" type="file" id="takePictureField" accept="image/*" onchange="uploadPhotos(\'#{imageUploadUrl}\')" />
<form id="uploadImageForm" enctype="multipa...
Why can I change value of a constant in javascript
...hat this is not a bug, but it should work this way? Because I thought that idea of the constant is that it can not be changed. Basically a programmer has trust that no matter what will happen, nothing can change the value inside of my constant.
– Salvador Dali
...
SVN+SSH, not having to do ssh-add every time? (Mac OS)
...ve to create it) to point to all the keys I have. Mine has the following:
IdentityFile ~/.ssh/identity
IdentityFile ~/.ssh/id_rsa
IdentityFile ~/.ssh/id_dsa
IdentityFile ~/.ssh/my_other_identity_here
IdentityFile ~/.ssh/yet_another_identity_here
According to the man page for ssh_config, it will ...
Android: How to enable/disable option menu item on button click?
...change the Options Menu any time after
it's first created, you must override
the onPrepareOptionsMenu() method.
This passes you the Menu object as it
currently exists. This is useful if
you'd like to remove, add, disable, or
enable menu items depending on the
current state of your appl...
SQL Server: What is the difference between CROSS JOIN and FULL OUTER JOIN?
... Then in case of big tables FROM t1 FULL OUTER JOIN t2 ON t1.id=t2.id will always be faster than FROM t1,t2 WHERE t1.id=t2.id ?
– alexkovelsky
Aug 20 '14 at 8:29
...
$http get parameters does not work
...t.php', {
params: {
source: link,
category_id: category
}
})
.success(function (data,status) {
$scope.info_show = data
});
See the Arguments section of http://docs.angularjs.org/api/ng.$http for more detail
...