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Postgres - FATAL: database files are incompatible with server
... btw, immediately after this you'll probably need to run createuser -s your_rails_app to create the rails' postgres user. See stackoverflow.com/questions/11919391/…
– Meekohi
Dec 20 '17 at 18:39
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Shell command to sum integers, one per line?
... for a: count all documents’ pages script: ls $@ | xargs -i pdftk {} dump_data | grep NumberOfPages | awk '{s+=$2} END {print s}'
– flying sheep
Jul 10 '13 at 14:42
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Creating a zero-filled pandas data frame
... try this:
d = pd.DataFrame(0, index=np.arange(len(data)), columns=feature_list)
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Using comparison operators in Scala's pattern matching system
...("ten")
case x if x > 10 => println("greater than ten")
case _ => println("less than ten")
}
Edit: Note that this is more than superficially different to putting an if after the =>, because a pattern won't match if the guard is not true.
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Is there a numpy builtin to reject outliers from a list
...ng like the following? That is, take a list d and return a list filtered_d with any outlying elements removed based on some assumed distribution of the points in d .
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How do you represent a JSON array of strings?
...inted.
Here are a few extra valid JSON examples, one per block:
{}
[0]
{"__comment": "json doesn't accept comments and you should not be commenting even in this way", "avoid!": "also, never add more than one key per line, like this"}
[{ "why":null} ]
{
"not true": [0, false],
"true": true,...
Merging objects (associative arrays)
...e:
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/assign
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Git merge without auto commit
...merged in (as opposed to a traditional merge) you need to run rm .git/MERGE_HEAD afterward, which will force git to forget that the merge happened.
– Jonn
Feb 27 '16 at 0:23
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String literals: Where do they go?
...c";
8: 48 c7 45 f8 00 00 00 movq $0x0,-0x8(%rbp)
f: 00
c: R_X86_64_32S .rodata
So the string is stored in the .rodata section.
Then:
readelf -l a.out
Contains (simplified):
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz ...
presentViewController:animated:YES view will not appear until user taps again
...eue:
[self presentViewController:vc animated:YES completion:nil];
dispatch_async(dispatch_get_main_queue(), ^{});
It's funny, but if you shake the device, it'll also trigger the main loop (it has to process the motion events). Same thing with taps, but that's included in the original question :) ...