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Why are these numbers not equal?
...umbers can be represented exactly in IEEE floating point arithmetic (the standard that almost all computers use to represent decimal numbers and do math with them), you will not always get what you expected. This is especially true because some values which are simple, finite decimals (such as 0.1 a...
How to get image size (height & width) using JavaScript?
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You can programmatically get the image and check the dimensions using Javascript...
const img = new Image();
img.onload = function() {
alert(this.width + 'x' + this.height);
}
img.src = 'http://www.google.com/intl/en_ALL/images/logo.gif';
This can be u...
Way to get all alphabetic chars in an array in PHP?
...t all alphabetic chars (A-Z) in an array in PHP so I can loop through them and display them?
14 Answers
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Application auto build versioning
...n.xyz=abc" main.go
abc
In order to set main.minversion to the build date and time when building:
go build -ldflags "-X main.minversion=`date -u +.%Y%m%d.%H%M%S`" service.go
If you compile without initializing main.minversion in this way, it will contain the empty string.
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OS X: equivalent of Linux's wget
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Also, wget is available via both MacPorts and Fink.
– Brian Clapper
Dec 31 '10 at 20:26
47
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How to normalize an array in NumPy?
...:
import numpy as np
from sklearn.preprocessing import normalize
x = np.random.rand(1000)*10
norm1 = x / np.linalg.norm(x)
norm2 = normalize(x[:,np.newaxis], axis=0).ravel()
print np.all(norm1 == norm2)
# True
share
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How to apply shell command to each line of a command output?
Suppose I have some output from a command (such as ls -1 ):
8 Answers
8
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What is the best way to use a HashMap in C++?
I know that STL has a HashMap API, but I cannot find any good and thorough documentation with good examples regarding this.
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List of tables, db schema, dump etc using the Python sqlite3 API
... can't find a way to get the equivalents of sqlite's interactive shell commands:
11 Answers
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Add custom messages in assert?
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Another option is to reverse the operands and use the comma operator. You need extra parentheses so the comma isn't treated as a delimiter between the arguments: assert(("A must be equal to B", a == b));
– Keith Thompson
J...