大约有 5,500 项符合查询结果（耗时：0.0198秒） [XML]
How do you know what to test when writing unit tests? [closed]
... it, as there were so many different payment options.
An invoice could be $100 but the customer only transferred $99.
Maybe you have sent sales invoices to a customer but you have also purchased from that customer.
So you sold him for $300 but you bought for $100. You can expect your customer to pay...
T-SQL split string
...o the outer query in order to avoid errors with recursion for strings > 100 characters. If that is also not a good alternative then see this answer as pointed out in the comments.
(Also, the delimiter will have to be NCHAR(<=1228). Still researching why.)
More on split functions, why (and pr...
What are the rules for evaluation order in Java?
...nceton.edu/java/11precedence/
Here is a good example:
System.out.println(3+100/10*2-13);
Question: What's the Output of the above Line?
Answer: Apply the Rules of Precedence and Associativity
Step 1: According to rules of precedence: / and * operators take priority over + - operators. Therefore th...
How to select rows from a DataFrame based on column values?
...f['A'] == 'foo'
5.84 µs ± 195 ns per loop (mean ± std. dev. of 7 runs, 100000 loops each)
166 µs ± 4.45 µs per loop (mean ± std. dev. of 7 runs, 10000 loops each)
Evaluating the mask with the numpy array is ~ 30 times faster. This is partly due to numpy evaluation often being faster. It ...
How do I write output in same place on the console?
...loading File FooFile.txt [%d%%]\r'%i,
Demo:
import time
for i in range(100):
time.sleep(0.1)
print 'Downloading File FooFile.txt [%d%%]\r'%i,
Python 3
print('Downloading File FooFile.txt [%d%%]\r'%i, end="")
Demo:
import time
for i in range(100):
time.sleep(0.1)
print('Dow...
How to align absolutely positioned element to center?
...
*{
margin:0;
padding:0;
}
section{
background:red;
height: 100vh;
width: 100vw;
}
div{
width: 80vw;
height: 80vh;
background: white;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
}
<section>
<div>
<h1&g...
How to beautify JSON in Python?
... HermsHerms
32.6k1010 gold badges7575 silver badges100100 bronze badges
...
How to define object in array in Mongoose schema correctly with 2d geo index
...a = new Schema(
{
address: {type: String, required: true, max: 100}, //contract address
// book_id: {type: String, required: true, max: 100}, //book id in the book collection
book: { type: Schema.ObjectId, ref: 'clc_books', required: true }, // Reference to the associat...
Difference between ActionBarSherlock and ActionBar Compatibility
...>
<item
android:id="@+id/action_1"
android:orderInCategory="100"
android:showAsAction="always"
android:title="@string/action1"/>
<item
android:id="@+id/action_2"
android:orderInCategory="100"
android:showAsAction="ifRoom"
android:title="@string/action2"/...
How to get current memory usage in android?
...
activityManager.getMemoryInfo(mi);
double availableMegs = mi.availMem / 0x100000L;
//Percentage can be calculated for API 16+
double percentAvail = mi.availMem / (double)mi.totalMem * 100.0;
Explanation of the number 0x100000L
1024 bytes == 1 Kibibyte
1024 Kibibyte == 1 Mebibyte
102...