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Favourite performance tuning tricks [closed]

...omeone asking me about optimisation. We mainly use Sybase, but most of the advice will apply across the board. SQL Server, for example, comes with a host of performance monitoring / tuning bits, but if you don't have anything like that (and maybe even if you do) then I would consider the followin...
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Creating a system overlay window (always on top)

... params.gravity = Gravity.RIGHT | Gravity.TOP; params.setTitle("Load Average"); WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE); wm.addView(mView, params); } Now, you will start getting each and every click event. So, you need to rectify in your eve...
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Why is argc not a constant?

... UNIX APIs, such as getopt, actually do manipulate argv[], so it can't be made const for that reason also. (Aside: Interestingly, although getopt's prototype suggests it won't modify argv[] but may modify the strings pointed to, the Linux man page indicates that getopt permutes its arguments, and...
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Why do we need to install gulp globally and locally?

...ncluding outside of node projects. Global installs for a node project are bad because they make deployment more difficult. npm 5.2+ The npx utility bundled with npm 5.2 solves this problem. With it you can invoke locally installed utilities like globally installed utilities (but you must begin the...
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What are good grep tools for Windows? [closed]

...(I'm still a fan of PowerGREP, but I don't use it anymore.) I know you already mentioned it, but PowerGREP is awesome. Some of my favorite features are: Right-click on a folder to run PowerGREP on it Use regular expressions or literal text Specify wildcards for files to include & exclude Search...
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Cannot send a content-body with this verb-type

...standard emulator). What confuses me is that as far as i know, I have not added any content body, unless I've inadvertently done it somehow. My code is below (very simple). Is there anything else i need to do to convince .NET that this is just a http GET? ...
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2 column div layout: right column with fixed width, left fluid

...r div, so that it surrounds both inner divs. Finally, at the left column, add a width: auto and overflow: hidden, this makes the left column independent from the right one (for example, if you resized the browser window, and the right column touched the left one, without these properties, the left ...
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OSGi: What are the differences between Apache Felix and Apache Karaf?

...t the OSGi core runtime. Karaf provides a "distribution" based on Felix by adding other features such as a console, an SSH remoting mechanism, a file deployer and more. In this diagram of the Karaf architecture, Felix (or other OSGi implementation - currently Equinox is also supported) is the OSGi...
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How do I get a UTC Timestamp in JavaScript?

...ject is to construct it from a date string that includes the timezone. (I had problems getting that to work in an older Android browser.) Note that getTime() returns milliseconds, not plain seconds. For a UTC/Unix timestamp, the following should suffice: Math.floor((new Date()).getTime() / 1000) ...
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How can I make the tabs work normally on Xcode 4?

Xcode finally added tabs but the problem is that they behave very strange. For example they will keep a tab open only if it was opened to a new tab. ...