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How do I update if exists, insert if not (AKA “upsert” or “merge”) in MySQL?
...unique key on geb and topic it will work (ALTER TABLE table ADD UNIQUE geb_by_topic (geb, topic)).
– chaos
Aug 2 '09 at 13:43
1
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How to delete (not cut) in Vim?
...contents of the (volatile) default register "", which has been overwritten by dd. But you still can paste from the (non volatile) yank register "0, which won't be overwritten by the delete command dd.
So these are the commands you want to use as per your example:
yy
dd
"0p
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Angular.js: How does $eval work and why is it different from vanilla eval?
...lly placed in bindings such as {{ expression }}. Expressions are processed by $parse service.
It's a JavaScript-like mini-language that limits what you can run (e.g. no control flow statements, excepting the ternary operator) as well as adds some AngularJS goodness (e.g. filters).
Q: Why isn't pl...
“Unknown provider: aProvider
...did not add any global functions -- it just stopped working, mysteriously, by mangling some controller/directive/service/filter?
– zenocon
May 7 '14 at 23:50
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What's the significance of Oct 12 1999? [closed]
...ormsAuthentication , the ASP.NET team chose to expire the FormsAuth cookie by setting the expiration date to "Oct 12 1999".
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Avoiding SQL injection without parameters
...n, because when you double the single quote the first one is still escaped by the backslash, leaving the 2nd one "active":
x\' OR 1=1;--
Also, JulianR brings up a good point below: NEVER try to do security work yourself. It's so easy to get security programming wrong in subtle ways that ap...
Differences between fork and exec
...cesses are now running exactly the same code, they can tell which is which by the return code of fork - the child gets 0, the parent gets the PID of the child. This is all, of course, assuming the fork call works - if not, no child is created and the parent gets an error code.
The exec call is a wa...
Typical AngularJS workflow and project structure (with Python Flask)
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I would start out by organizing the Flask app in the standard structure as follows:
app
|-- app.py
|-- static
|-- css
|-- img
|-- js
|-- templates
And as btford mentioned, if you are doing an Angular app, you'll want to focus on...
cannot find zip-align when publishing app
...I encouraged everyone to update to Android SDK Build-tools 20 as suggested by Pang in the post below.
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Can a shell script set environment variables of the calling shell? [duplicate]
...t then outputs a language specific set of instructions that must be eval'd by the calling process.
– matpie
Jan 30 '09 at 22:02
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