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Simulate CREATE DATABASE IF NOT EXISTS for PostgreSQL?
... not exist through JDBC. Unlike MySQL, PostgreSQL does not support create if not exists syntax. What is the best way to accomplish this?
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Why does calling a function in the Node.js REPL with )( work?
...changed for 0.11.x, which will just wrap { ... } rather than all input:
if (/^\s*\{/.test(evalCmd) && /\}\s*$/.test(evalCmd)) {
// It's confusing for `{ a : 1 }` to be interpreted as a block
// statement rather than an object literal. So, we first try
// to wrap it in parenth...
I ran into a merge conflict. How can I abort the merge?
...irst, and then examine the upstream changes (git log ..@{upstream} or git diff ..@{upstream}). After that, like you, I'll rebase my work.
– Pat Notz
May 14 '10 at 23:26
171
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How to go back (ctrl+z) in vi/vim
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I know that most of my answer is duplicated with those already present, but the value added of my answer is redo as Ctrl + r (lower case r) based on the documentation. Nobody before put it here. In addition, I tried to make the ...
SqlException from Entity Framework - New transaction is not allowed because there are other threads
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We have now posted an official response to the bug opened on Connect. The workarounds we recommend are as follows:
This error is due to Entity Framework creating an implicit transaction during the SaveChanges() call. The best way t...
Django, creating a custom 500/404 error page
...rial found here exactly, I cannot create a custom 500 or 404 error page. If I do type in a bad url, the page gives me the default error page. Is there anything I should be checking for that would prevent a custom page from showing up?
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iOS 7 parallax effect in my view controller
...dd both effects to your view
[myBackgroundView addMotionEffect:group];
Swift (Thanks to @Lucas):
// Set vertical effect
let verticalMotionEffect = UIInterpolatingMotionEffect(keyPath: "center.y",
type: .TiltAlongVerticalAxis)
verticalMotionEffect.minimumRelativeValue = -10
verticalMotionEffect.ma...
What APIs are used to draw over other apps (like Facebook's Chat Heads)?
... that events outside of your display area go to the underlying UIs. You'll now find it works, but that other bad things still happen, like the back/menu buttons don't get directed to apps, plus no keyboard. To solve that you need FLAG_NOT_FOCUSABLE.
You get a side effect from the non-focusable bit ...
Suppressing deprecated warnings in Xcode
... (pro tip: just type in "deprecated" in the build settings to find the specific setting for this warning).
Current versions of Xcode (e.g. Xcode 9.2):
Ancient versions of Xcode (e.g. Xcode 2.x, 3.x):
share
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Mongoose: Get full list of users
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Well, if you really want to return a mapping from _id to user, you could always do:
server.get('/usersList', function(req, res) {
User.find({}, function(err, users) {
var userMap = {};
users.forEach(function(user) {
...