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Associative arrays in Shell scripts
...r.sh brian 10 5
real 0m0.226s
user 0m0.057s
sys 0m0.123s
$ time ./driver.sh jerry 10 5
real 0m0.706s
user 0m0.228s
sys 0m0.530s
$ time ./driver.sh irfan 100 5
real 0m10.633s
user 0m4.366s
sys 0m7.127s
$ time ./driver...
git diff file against its last change
... You can reference previous commits as HEAD^ (in your example this will be 123abc) or HEAD^^ (456def in your example), etc ...
So the answer to your question is:
git diff HEAD^^ myfile
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im...
How to collapse all methods in Xcode?
...
This is a LifeSaver!
– bhakti123
Nov 2 '18 at 7:14
add a comment
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How can I ask the Selenium-WebDriver to wait for few seconds in Java?
...
123
Well, there are two types of wait: explicit and implicit wait.
The idea of explicit wait is
...
Why isn't SQL ANSI-92 standard better adopted over ANSI-89?
...AS j USING(userid)
JOIN useraccounts AS us USING(userid)
WHERE j.jobid = 123
This is completely ambiguous. I put a UserID column in both Companies and user tables and there's no complaint. What if the UserID column in companies is the ID of the last person to modify that row?
I'm serious, Can ...
What is the difference between re.search and re.match?
...he below example to understand the working of re.match and re.search
a = "123abc"
t = re.match("[a-z]+",a)
t = re.search("[a-z]+",a)
re.match will return none, but re.search will return abc.
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Angular.js directive dynamic templateURL
...d attrs from a templateUrl function. THANKS!
– coryvb123
Jun 18 '14 at 20:05
7
templateUrl is cal...
AppInventor2 .keystore 证书文件 - App版本升级的奥秘 · App Inventor 2 中文网
...orepass "android" -validity 10000 -dname "CN=AppInventor for Android, O=fun123.cn, C=CN"
具体参数很简单，可以让AI辅助解析。其中，10000 是证书过期天数，也是安卓官方建议的值。
Android docs recommend “10000” as the expiration of days.
直接采用命令...
How do I correctly clone a JavaScript object?
...(JSON.stringify(object)):
const a = {
string: 'string',
number: 123,
bool: false,
nul: null,
date: new Date(), // stringified
undef: undefined, // lost
inf: Infinity, // forced to 'null'
}
console.log(a);
console.log(typeof a.date); // Date object
const clone = JSON...
App Inventor 2 数学积木的9个隐藏用法：随机种子、位运算、取整陷阱，踩中...
...例代码，可以参考 App Inventor 2 中文网文档：https://www.fun123.cn/reference/blocks/math.html