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How do I work around JavaScript's parseInt octal behavior?
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If you know your value will be in the signed 32 bit integer range, then ~~x will do the correct thing in all scenarios.
~~"08" === 8
~~"foobar" === 0
~~(1.99) === 1
~~(-1.99) === -1
If you look up binary not (~), the spec requires a "ToInt32" conversion for the argument which does...
How to set text size of textview dynamically for different screens [duplicate]
...pi
values-hdpi
And write the text size in 'dimensions.xml' file for each range.
And in the java code you can set the text size with
textView.setTextSize(getResources().getDimension(R.dimen.textsize));
Sample dimensions.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<...
Is there documentation for the Rails column types?
...tance, MySQL's TIMESTAMP datatype is stored as a unix timestamp. Its valid range goes from 1970 to 2038, and the time is stored as the number of seconds that have elapsed since the last epoch, which is supposedly standard, but in practice can differ from system to system. Recognizing that relative t...
Smooth scroll to div id jQuery
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This can be done in plain JS:
document
.getElementById("range-calculator")
.scrollIntoView({ behavior: "smooth" });
Browser support is a bit issue, but modern browsers support it.
share
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How to round up a number in Javascript?
...000000000) / precision. You will get a fraction 0.015900001. Need to add a range validation for precision.
– Frank
Dec 24 '17 at 1:00
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grep, but only certain file extensions
... This example seems to have a high score because it covers such a wide range of possibilites but the answer given below of grep -r --include=*.txt 'searchterm' ./ really explains the essence of the answer
– David Casper
Jan 27 '17 at 1:44
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Controlling mouse with Python
...l mouse using win32api:
import win32api
import time
import math
for i in range(500):
x = int(500+math.sin(math.pi*i/100)*500)
y = int(500+math.cos(i)*100)
win32api.SetCursorPos((x,y))
time.sleep(.01)
A click using ctypes:
import ctypes
# see http://msdn.microsoft.com/en-us/libr...
How do I validate a date string format in python?
... 317, in parse
ret = default.replace(**repl)
ValueError: day is out of range for month
dateutil is also extremely useful if you start needing to parse other formats in the future, as it can handle most known formats intelligently and allows you to modify your specification: dateutil parsing ex...
What does auto&& tell us?
...amp; works perfectly! An example of using auto&& like this is in a range-based for loop. See my other question for more details.
If you then use std::forward on your auto&& reference to preserve the fact that it was originally either an lvalue or an rvalue, your code says: Now that ...
Counting null and non-null values in a single query
...ook, but either the column is indexed or not. If it is, it happens via a range scan, otherwise, you are pretty much left with a full table scan. In oracle, NULLs are not stored in the index, so I suspect you example isn't much better. Your milage may very.
– EvilTeach
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