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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
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'npm' is not recognized as internal or external command, operable program or batch file
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123
Don't forget to reboot your computer after installing node! That one got me.
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Remove duplicated rows
...for larger data sets
library(microbenchmark)
library(data.table)
set.seed(123)
DF <- as.data.frame(matrix(sample(1e8, 1e5, replace = TRUE), ncol = 10))
DT <- copy(DF)
setDT(DT)
microbenchmark(unique(DF), unique(DT))
# Unit: microseconds
# expr min lq mean median ...
How do I pre-populate a jQuery Datepicker textbox with today's date?
...k and doesn't make jQuery search the DOM twice.
– abc123
Aug 1 '13 at 20:36
1
Great, accepted ans...
How do you check if a certain index exists in a table?
...
AdaTheDevAdaTheDev
123k2424 gold badges179179 silver badges181181 bronze badges
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Simple regular expression for a decimal with a precision of 2
...e
deci_num_checker = re.compile(r"""^[0-9]+(\.[0-9]{1,2})?$""")
valid = ["123.12", "2", "56754", "92929292929292.12", "0.21", "3.1"]
invalid = ["12.1232", "2.23332", "e666.76"]
assert len([deci_num_checker.match(x) != None for x in valid]) == len(valid)
assert [deci_num_checker.match(x) == None fo...
How do I replace a git submodule with another repo?
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123
If the location (URL) of the submodule has changed, then you can simply:
Modify your .gitmod...
Is there a minlength validation attribute in HTML5?
...answered Apr 24 '12 at 8:24
user123444555621user123444555621
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How to check certificate name and alias in keystore files?
...ven command will yield all aliases containing the pattern 'foo', f.e. foo, 123_FOO, fooBar, etc. For more information man grep.
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About Android image and asset sizes
... in a subfolder e.g.:
/
.. createAndroidImages.sh
.. originalImages/
....a123.png
....b456.png
Run the shell script in terminal: sh createAndroidImages.sh
To copy the created images directly to your Android Studio Project:
cp -R drawable-* ~/AndroidStudioProjects/ESCRating/app/src/main/res/
Y...