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Evaluate expression given as a string
...o change the string into an expression:
> eval(parse(text="5+5"))
[1] 10
> class("5+5")
[1] "character"
> class(parse(text="5+5"))
[1] "expression"
Calling eval() invokes many behaviours, some are not immediately obvious:
> class(eval(parse(text="5+5")))
[1] "numeric"
> class(eval...
live output from subprocess command
...poll() is None:
sys.stdout.write(reader.read())
time.sleep(0.5)
# Read the remaining
sys.stdout.write(reader.read())
This way you will have the data written in the test.log as well as on the standard output.
The only advantage of the file approach is that your code doesn'...
What's an easy way to read random line from a file in Unix command line?
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edited Jul 10 '15 at 16:42
rogerdpack
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When to use DataContract and DataMember attributes?
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Ross Presser
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answered Jan 29 '11 at 12:18
marc_smarc_s
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Select all elements with “data-” attribute without using jQuery
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440
You can use querySelectorAll:
document.querySelectorAll('[data-foo]');
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How can an html element fill out 100% of the remaining screen height, using css only?
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The trick to this is specifying 100% height on the html and body elements.
Some browsers look to the parent elements (html, body) to calculate the height.
<html>
<body>
<div id="Header">
</div>
<div id...
How do I get the APK of an installed app without root access?
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edited Jul 30 '18 at 15:31
TylerH
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How can I get my Twitter Bootstrap buttons to right align?
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707
Insert pull-right into the class attribute and let bootstrap arrange the buttons.
For Bootstra...
How to fully remove Xcode 4
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answered Mar 12 '11 at 20:27
esqewesqew
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check android application is in foreground or not? [duplicate]
...ean doInBackground(Context... params) {
final Context context = params[0].getApplicationContext();
return isAppOnForeground(context);
}
private boolean isAppOnForeground(Context context) {
ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_...