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Left padding a String with Zeros [duplicate]
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20 Answers
20
Active
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Create table using Javascript
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103
This should work (from a few alterations to your code above).
function tableCreate() {
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Exit Shell Script Based on Process Exit Code
...ble so you would have something like:
ls -al file.ext
rc=$?; if [[ $rc != 0 ]]; then exit $rc; fi
You need to be careful of piped commands since the $? only gives you the return code of the last element in the pipe so, in the code:
ls -al file.ext | sed 's/^/xx: /"
will not return an error cod...
What, exactly, is needed for “margin: 0 auto;” to work?
I know that setting margin: 0 auto; on an element is used to centre it (left-right). However, I know that the element and its parent must meet certain criteria for the auto margin to work, and I can never seem to get the magic right.
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Android : Check whether the phone is dual SIM
... telephonyInfo.imeiSIM1 = getDeviceIdBySlot(context, "getDeviceIdGemini", 0);
telephonyInfo.imeiSIM2 = getDeviceIdBySlot(context, "getDeviceIdGemini", 1);
} catch (GeminiMethodNotFoundException e) {
e.printStackTrace();
try {
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Running a cron job on Linux every six hours
...got a *, and you've too many fields. It's the hour you need to care about
0 */6 * * * /path/to/mycommand
This means every sixth hour starting from 0, i.e. at hour 0, 6, 12 and 18 which you could write as
0 0,6,12,18 * * * /path/to/mycommand
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Android Studio rendering problems
I'm using Android Studio 0.2.3 and when opened an activity layout normally, the preview should appear on the right side, so that I can switch between Text and Design mode, which should again show the preview of the layout.
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php - get numeric index of associative array
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answered Jul 29 '10 at 18:26
FoscoFosco
35.5k66 gold badges7777 silver badges9898 bronze badges
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Make footer stick to bottom of page correctly [duplicate]
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10 Answers
10
Active
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Extract a regular expression match
...nd adds a few that are missing:
library(stringr)
str_locate("aaa12xxx", "[0-9]+")
# start end
# [1,] 4 5
str_extract("aaa12xxx", "[0-9]+")
# [1] "12"
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