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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
...Time (-O2) Time (-Os) Fastest
AMD Opteron 8350 gcc-4.8.1 0.704s 0.896s -O2
AMD FX-6300 gcc-4.8.1 0.392s 0.340s -Os
AMD E2-1800 gcc-4.7.2 0.740s 0.832s -O2
Intel Xeon E5405 ...
Subset of rows containing NA (missing) values in a chosen column of a data frame
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147
Never use =='NA' to test for missing values. Use is.na() instead. This should do it:
new_DF &l...
What is the difference between Collection and List in Java?
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edited Dec 11 '17 at 14:43
answered Jul 23 '10 at 10:44
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Why wasn't PyPy included in standard Python?
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edited Apr 17 '15 at 4:38
answered Oct 12 '12 at 21:35
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How can I convert spaces to tabs in Vim or Linux?
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edited Feb 22 '15 at 8:49
answered Feb 2 '12 at 1:26
Joh...
Why is #!/usr/bin/env bash superior to #!/bin/bash?
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answered Feb 6 '14 at 20:12
ziggzigg
16.4k55 gold badges3131 silver badges5252 bronze badges
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What's the difference between nohup and ampersand
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answered Mar 24 '13 at 5:04
nemonemo
44.3k1010 gold badges115115 silver badges118118 bronze badges
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In Flux architecture, how do you manage Store lifecycle?
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124
In a Flux app there should only be one Dispatcher. All data flows through this central hub. Ha...
Python group by
... input = [('11013331', 'KAT'), ('9085267', 'NOT'), ('5238761', 'ETH'), ('5349618', 'ETH'), ('11788544', 'NOT'), ('962142', 'ETH'), ('7795297', 'ETH'), ('7341464', 'ETH'), ('9843236', 'KAT'), ('5594916', 'ETH'), ('1550003', 'ETH')]
>>> from collections import defaultdict
>>> res = d...
ADB not recognising Nexus 4 under Windows 7
...ing hardware devices. However, Eclipse is still not recognising my Nexus 4 when I try to run the application. The Android device chooser pops up, but it doesn't show anything on the hardware section. I've turned debugging, third-party apps, and mock locations all on on my phone as well.
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