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Does Javascript pass by reference? [duplicate]
Does Javascript pass by references or pass by values? Here is an example from Javascript: The Good Parts . I am very confused about my parameter for the rectangle function. It is actually undefined , and redefined inside the function. There are no original reference. If I remove it from the func...
Disable ONLY_FULL_GROUP_BY
I accidentally enabled ONLY_FULL_GROUP_BY mode like this:
26 Answers
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Why C# implements methods as non-virtual by default?
Unlike Java, why does C# treat methods as non-virtual functions by default? Is it more likely to be a performance issue rather than other possible outcomes?
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How to print a number with commas as thousands separators in JavaScript
...<!\.\d*) is a negative lookbehind that says the match can't be preceded by a . followed by zero or more digits. The negative lookbehind is faster than the split and join solution (comparison), at least in V8.
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Selenium c# Webdriver: Wait Until Element is Present
...d the approach provided and found the method was deprecated as pointed out by Samuel. Checking for the existence of an item now waits up to the specified time.
– Jim Scott
Jun 1 '17 at 0:47
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Remove portion of a string after a certain character
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$variable = substr($variable, 0, strpos($variable, "By"));
In plain english: Give me the part of the string starting at the beginning and ending at the position where you first encounter the deliminator.
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Examples of GoF Design Patterns in Java's core libraries
...esign patterns in Wikipedia. It also mentions which patterns are mentioned by GoF. I'll sum them up here and try to assign as many pattern implementations as possible, found in both the Java SE and Java EE APIs.
Creational patterns
Abstract factory (recognizeable by creational methods returning the...
How to select a drop-down menu value with Selenium using Python?
...le:
from selenium import webdriver
b = webdriver.Firefox()
b.find_element_by_xpath("//select[@name='element_name']/option[text()='option_text']").click()
You can read more in:
https://sqa.stackexchange.com/questions/1355/unable-to-select-an-option-using-seleniums-python-webdriver
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Passing a String by Reference in Java?
... @Boris Pavlovic - yes, but unless the same StringBuilder is used by different threads, which IMO is unlikely in any given scenario, it should not be a problem. It doesn't matter if the method is called by different threads, receiving different StringBuilder.
– Ravi Wa...
How can I multiply and divide using only bit shifting and adding?
...y in terms of adding and shifting you want to decompose one of the numbers by powers of two, like so:
21 * 5 = 10101_2 * 101_2 (Initial step)
= 10101_2 * (1 * 2^2 + 0 * 2^1 + 1 * 2^0)
= 10101_2 * 2^2 + 10101_2 * 2^0
= 10101_2 << 2 + 10101_2 << 0 (De...