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How can I detect if a selector returns null?
...my answer porting Rails' presence method.
– Marc-André Lafortune
Feb 26 '13 at 22:22
5
If you wa...
Extracting specific columns from a data frame
... answered Apr 10 '12 at 9:50
Stéphane LaurentStéphane Laurent
39.9k1313 gold badges7373 silver badges143143 bronze badges
...
How can I access my localhost from my Android device?
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Mac OS X users
I achieved this by enabling remote management:
Ensure that your phone and laptop are connected to the same WiFi network
On Mac, go to System preferences/sharing
Enable remote management
You will see a mess...
Build an ASCII chart of the most commonly used words in a given text [closed]
...Edit: Replaced semicolons by line breaks for "readability". :P
Edit 2: Shtééf pointed out I forgot the trailing space - fixed that.
Edit 3: Removed the trailing space again ;)
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String formatting: % vs. .format vs. string literal
...ed Feb 13 '17 at 15:51
Jean-François Corbett
33.6k2525 gold badges124124 silver badges172172 bronze badges
answered Aug 1 '11 at 3:01
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Why is React's concept of Virtual DOM said to be more performant than dirty model checking?
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Here's a comment by React team member Sebastian Markbåge which sheds some light:
React does the diffing on the output (which is a known serializable format, DOM attributes). This means that the source data can be of any format. It can be immutable data structures and state in...
Unable to run app in Simulator: Xcode beta 6 iOS 8
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@Dayan Gonzalez I have same issue in my mac mini how can i fix?
– PREMKUMAR
Sep 12 '14 at 10:54
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Delete a line in Eclipse
...sist... there are all kinds of useful keyboard shortcuts for Eclipse.
For Mac users: ⌘ + D
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Shortcut to Apply a Formula to an Entire Column in Excel [closed]
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Nothing happened when I did this in Office for Mac; I'm sure there's a discrepancy between the two versions.
– 2rs2ts
Jun 6 '13 at 17:57
2
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Detecting Windows or Linux? [duplicate]
... {
System.out.println("This is Windows");
} else if (isMac()) {
System.out.println("This is Mac");
} else if (isUnix()) {
System.out.println("This is Unix or Linux");
} else if (isSolaris()) {
System.out.println("This is Solaris...