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asked Feb 5, 2021 in Others[杂七杂八] by ostack (1.4k points)

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1 answer 120 views

c++ - Default constructor with empty brackets

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 65 views

Performance optimization strategies of last resort

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 75 views

sql - Get top 1 row of each group

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 96 views

javascript - JQuery - $ is not defined

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 146 views

python - Iterating over dictionaries using 'for' loops

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 113 views

sql server - Parameterize an SQL IN clause

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 171 views

javascript - What is the difference between JSON and Object Literal Notation?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 253 views

regex - Using regular expressions to parse HTML: why not?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 142 views

python - Why does Tkinter image not show up if created in a function?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 177 views

java - String.equals versus ==

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 191 views

How can I convert ereg expressions to preg in PHP?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 280 views

Does Python have a ternary conditional operator?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 206 views

c - Crash or "segmentation fault" when data is copied/scanned/read to an uninitialized pointer

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 77 views

java - Android permission doesn't work even if I have declared it

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 376 views

javascript - No 'Access-Control-Allow-Origin' header is present on the requested resource—when trying to get data from a REST API

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 118 views

javascript - Why do regex constructors need to be double escaped?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 179 views

Is there a JavaScript / jQuery DOM change listener?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 52 views

What is SQL injection?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 685 views

design patterns - What is dependency injection?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 180 views

What is an efficient way to implement a singleton pattern in Java?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 474 views

python - Are global variables thread-safe in Flask? How do I share data between requests?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 451 views

sql - MySQL pivot row into dynamic number of columns

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 109 views

python - Relative imports for the billionth time

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 123 views

html - What to do Regular expression pattern doesn't match anywhere in string?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 243 views

r - Order Bars in ggplot2 bar graph

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 147 views

python - How to make function decorators and chain them together?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 293 views

c# - What are good ways to prevent SQL injection?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 95 views

c++ - How to access a local variable from a different function using pointers?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 198 views

c++ - When to use virtual destructors?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 148 views

javascript - What are the nuances of scope prototypal / prototypical inheritance in AngularJS?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 198 views

c# - How do I use reflection to call a generic method?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 69 views

python - How to filter Pandas dataframe using 'in' and 'not in' like in SQL

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 184 views

language agnostic - Why are floating point numbers inaccurate?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 238 views

shell - How do I set a variable to the output of a command in Bash?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 86 views

How do I check if an array includes a value in JavaScript?

asked Oct 16, 2021 in Technique[技术] by 深蓝 (71.8m points)

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